Daisy
Last Updated: Jul 17, 2026
* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Liquids to stabilize nutrient pH in hydroponics
Includes pH Up and pH Down 1 qt. bottles
pH Up: base solution formulated with potassium carbonate
pH Down: acid formulation that uses phosphoric acid
pH is important because it affects availability and absorption of several of the 16 atomic elements needed for plant growth
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Bloom City | 9.77 | ✅ | ✅ | ✅ |
STRONG ACID AND BASE FOR SUPERIOR PH STABILITY: Bloom City pH Down and Up are strong pH adjusting agents that help the home grower maintain optimal pH levels. Formulated with the highest grade pH adjusting formulas
WORKS IN ALL ENVIRONMENTS: Designed for hydroponics systems, soilless mediums (eg: coco coir and peat), and soil gardens
SAFE TO USE FOR ALL PLANTS: Add to every watering to adjust pH to the desired level, for soil usually aim for a pH of 5.8-6.2, it’s that easy
HIGHEST QUALITY, MOST POTENT, BEST VALUE, BIGGEST YIELD: Bloom City’s ingredients are better for plants, better for you, and better for the planet. Simply the best choice for the conscientious grower
FORMULATED AND MADE IN THE USA: Designed by botanists and plant chemists in Seattle, Washington. Bloom City chooses only the highest quality ingredient sources and manufacturing methods to create the world’s best craft growing nutrient systems
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Granite Supply | 9.71 | ❌ | ❌ | ❌ |
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Bloom City | 9.77 | ✅ | ✅ | ✅ |
STRONG ACID FOR SUPERIOR PH STABILITY: Bloom City pH Down is a strong pH adjusting acid that helps the home grower maintain optimal pH levels. Formulated with the highest grade pH adjusting formula
WORKS IN ALL ENVIRONMENTS: Designed for hydroponics systems, soilless mediums (eg: coco coir and peat), and soil gardens
SAFE TO USE FOR ALL PLANTS: Add to every watering to adjust pH to the desired level, for soil usually aim for a pH of 5.8-6.2, it’s that easy
HIGHEST QUALITY, MOST POTENT, BEST VALUE, BIGGEST YIELD: Bloom City’s ingredients are better for plants, better for you, and better for the planet. Simply the best choice for the conscientious grower
FORMULATED AND MADE IN THE USA: Designed by botanists and plant chemists in Seattle, Washington. Bloom City chooses only the highest quality ingredient sources and manufacturing methods to create the world’s best craft growing nutrient systems
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
PROMOTES PH STABILITY: The Microbe Life Hydroponics pH Control Kit includes strong pH adjusting agents that helps home growers maintain optimal pH levels by increasing or decreasing the pH in your system
HOW TO FIX YOUR PH: Using a pH meter, determine your pH level; For soil you typically will want to aim for a pH of 5.8-6.2; An indication of low pH will require a water flush with pH up to raise the pH levels; High levels will require pH Down
SAFELY ADJUSTS PH: pH UP and pH DOWN are formulated with deionized and UV-sterilized water and combine two pH adjusters for buffered effectiveness; pH UP and pH DOWN will not harm plants and are safe to use around humans and pets
WORKS IN ALL ENVIRONMENTS: Use with nutrient solutions for all hydroponic supplies, NFT, drip systems, aeroponic, irrigation, and liquid feeding systems with soil or soilless media including coco coir; Bottles includes application instructions
INCLUDES SAMPLE OF PHOTOSYNTHESIS PLUS: Photosynthesis Plus is an all-natural liquid conditioner that maximizes the plant’s ability to use available light, increase conversion of CO2 into carbohydrates, and achieve maximum yields
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Granite Supply | 9.72 | ❌ | ❌ | ❌ |
General Hydroponics Three-Part Flora Series delivers the nutrients your hydroponic plants need to grow big and fast from bud to bloom; includes FloraMicro 5-0-1, FloraGro 2-1-6, FloraBloom 0-5-4, and a pH Control Kit
Flora Series is adaptable to many different plant types and can be used with fast-growing plants that have high metabolic rates or used as a mild nutrient for delicate or slow-growing plants
Combine FloraMicro 5-0-1, FloraGro 2-1-6, FloraBloom 0-5-4 to create a nutrient mix tailor-made for your plants and their phase of growth (seedling, cutting, flowering, or fruiting); the unique system gives you greater control over the nutrient mix than a single-part nutrient
Packed with primary and secondary nutrients, the well-balanced formulas of FloraMicro 5-0-1, FloraGro 2-1-6, FloraBloom 0-5-4 provide signature plant food growers have trusted for more than 40 years
Ideal for hydroponic applications in many types of growing media; apply General Hydroponics Flora Series throughout full plant lifecycle following directions on label and measure pH with included pH Control Kit
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
A HYDROPONICS ESSENTIAL: Nourish-L Liquid Fertilizer and Water Conditioner leverages the power of rare earth humates to build a foundation of essential elements for growth; Nourish-L produces larger blooms and healthy, fast growing, vigorous plants
UNIQUE FORMULA: Nourish-L is derived from a highly decomposed organic humus deposit, unparalleled in any other source of humates; The natural carbon from marine animal and vegetative compounds enhances nutrient absorption from food in hydroponics systems
ACCELERATES GROWTH: Humic acids in Nourish-L increase water retention and improve nutrient uptake for your plants and herbs; This boosts root system development and aids in photosynthesis, leading to increased cell energy, and growth
IMPROVES PLANT NUTRITION: Nourish-L is a rich source of bio-available organic carbon and other elements to support your plants; This increases vigor to help plants resist environmental stress and pathogens, resulting in consistent growth and larger yields
ADDITIONAL INFO: Nourish-L is a registered CDFA Organic input material; it can be used in indoor or outdoor gardens with any hydroponic, NFT, DWC, drip, aeroponic, aquaponics, and liquid feeding systems with soil or soilless media including coco coir
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
WHEN TO TEST FOR PH: If the pH is off, you may see leaf discolouration as well as reduced growth which may indicate excessively acidic conditions
HOW TO KNOW WHEN TO INCREASE PH LEVELS: It is important to raise your pH levels when there is a nutrient lockdown. This shows itself by making your plant roots unable to absorb the nutrient you feed it so your plants may experience leaf burn and discoloration because although you are feeding them essential nutrient, they are unable to absorb them.
HOW TO FIX YOUR PH: Using a pH meter, determine you pH level. An indication of low pH will require a water flush with pH up to raise the pH levels.
SAFELY RAISES PH: The most important part of the MICROBE LIFE pH UP is that it will safely raise pH levels in nutrient solutions and will never harm plants which means you can rest assured knowing you will have a safe and successful grow.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Green Supplies | 9.84 | ✅ | ✅ | ✅ |
INCREASES NUTRIENT ABSORPTION: It’s created to effectively increase and optimize pH levels in various plant growth mediums including hydroponic nutrients pH, and maximize nutrient uptake and yield.
SAVES COSTS: A single bottle can go a long way. It’s a concentrated solution so you just need a few drops for maximum effectiveness. Enjoy outstanding output with minimal gardening cost increment!
CLEAN INGREDIENTS: This hydroponic pH controller is made with high-quality commercial-grade, water soluble potassium hydroxide and is 100% dye-free and additives-free, so it’s medium-friendly and ideal for your beloved botanicals.
VERSATILE USE: You can use our pH UP with your balanced nutrient solution for various growth environments like soil, water, hydroponic systems, coco cultivations, DWC systems, and more.
MADE BY EXPERTS: The hydroponic pH balance booster has been thoughtfully created by growers for growers. It’s a product of many years of gardening expertise and practical experience, so you can rest assured of its efficacy and potency.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Cult Hydro | 9.50 | ❌ | ❌ | ❌ |
General Hydroponics Flora grow Quart
General Hydroponics Flora micro Quart
General Hydroponics Flora bloom Quart
General Hydroponics CALiMAGic Quart
General Hydroponics pH control kit combo
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ❌ |
General Hydroponics pH Control Kit contains everything you need to measures pH levels of your hydroponic grow reservoirs
Highly fortified calcium and magnesium plant supplement formulated to correct common deficiencies
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| UsaHydroGardening | 7.73 | ❌ | ❌ | ❌ |
🌿 BIOLOGICALLY DERIVED HUMIC ACID FOR SAFE GARDENING - Unique natural extraction method. Ful-Power has a low molecular weight with light yellow, fulvicus golden color. Approved for organic production by OMRI (US and Canada) and CDFA OIM.
🌿 IMPROVED GROWTH AND HIGHER YIELDS - Ful-Power is made of highly bioavailable humic acid fractions. It accelerates uptake of nutrients and fertilizer. This results in vigorous roots and shoots growth of all plants.
🌿 IDEAL FOR HYDROPONICS, SOIL, AND SOILLESS MEDIA – Highly effective in all types of growing mediums and methods, all season long, for hobbyists and commercial growers. It is clean, does not clog lines. It does not affect PH, PPM, EC of the media.
🌿 QUALITY ASSURED BY TESTING EVERY BATCH - To ensure top performance, every production run of Ful-Power is tested with HPTA approved test method. Made in the USA.
🌿 EASY TO USE FOR ALL PLANTS – Use on hemp, turf grasses, tomato plants, vegetables, fruit, berries, and more. Enhances seed germination and soil conditioning. Protects plants against sub-optimal nutrients, light and temperature stresses.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Highly Concentrated Non-toxic Vitamin Solution Invigorating All Variety of Greenery for Home Gardeners and Professionals Alike
Super thrive Maximizes Potential by Quickly Building a Strong Root Base and Reducing Transplant Shock
Super thrive Replenishes the Soil to Nourish and Encourage the Natural Building Blocks That Plants Make Themselves under Optimum Conditions
Not sold in WI,SD
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Chemboys LLC | 6.94 | ❌ | ❌ | ❌ |
⬇️ [ Lower & Raise pH Levels of Your Nutrient Ecosystem ] – Chemboys pH Up and Down kit will help to control the pH balance of your plants nutrient ecosystem to bloom stronger and healthier than ever before! This pH Up & Down liquid plant fertilizer set can be used in hydroponics, coco coir, soil and many other environments.
🌸 [ Increase Bloom Size & Crop Yield ] – If you determine that your plants nutrient pH is too high or too low, simply add one of these pH adjuster liquids to get the perfect plant ecosystem! In turn, this will allow for a healthier garden for your crops, vegetables, vegetation and herbs to thrive. You will notice that your yield and bloom size will be off the charts!
💪 [ Concentrated, Strong Formula ] – This liquid plant fertilizer pH control kit features the strongest pH buffer supplements on the market! It is super concentrated to maintain your plants optimal pH balance of 5.5-6.5 in just a few applications. We never used any dyes, as our supplement is all-natural and sustainable!
🌱【 Stronger, Healthier & Larger Plants 】 – This pH Up & Down Control Kit plant nutritional supplement will help to neutralize the potential hydrogen of your plants ecosystem to make more nitrogen sulfur and phosphorus available to your crops. It is a must have for any personal or commercial grower!
😄 [ Manufactured in USA ] – We at Chemboys take pride in manufacturing our pH Up & Down Max plant supplement set 100% in the United States. This ensures ultimate environmental protection, plant growth ability, premium fertilization, optimal hydroponics and most of all, safety for our customers. Help support an American business today!
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| GROWDOTS | 9.53 | ❌ | ❌ | ❌ |
🌿 BIOLOGICALLY DERIVED HUMIC ACID FOR SAFE GARDENING - Unique natural extraction method. Ful-Power has a low molecular weight with light yellow, fulvicus golden color. Approved for organic production by OMRI (US and Canada) and CDFA OIM.
🌿 IMPROVED GROWTH AND HIGHER YIELDS - Ful-Power is made of highly bioavailable humic acid fractions. It accelerates uptake of nutrients and fertilizer. This results in vigorous roots and shoots growth of all plants.
🌿 IDEAL FOR HYDROPONICS, SOIL, AND SOILLESS MEDIA – Highly effective in all types of growing mediums and methods, all season long, for hobbyists and commercial growers. It is clean, does not clog lines. It does not affect PH, PPM, EC of the media.
🌿 QUALITY ASSURED BY TESTING EVERY BATCH - To ensure top performance, every production run of Ful-Power is tested with HPTA approved test method. Made in the USA.
🌿 EASY TO USE FOR ALL PLANTS – Use on hemp, turf grasses, tomato plants, vegetables, fruit, berries, and more. Enhances seed germination and soil conditioning. Protects plants against sub-optimal nutrients, light and temperature stresses.
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Amazon.com | 9.68 | ✅ | ✅ | ✅ |
Electronically controlled mains switching box that is designed to activate equipment via control signals from Bluelab Pro Controller; General uses include hydroponic system and plant growing tent
Temperature is a key parameter for healthy root and optimal nutrient absorption; PowerPod can help control reservoir temperature when combined with heater or cooler
Try Bluelab pH pen, EC meter, and other digital testers for full indoor garden nutrients monitoring in water and soil
100 V~-240 V~, 50/60 Hz compatible; KIT INCLUDE: Bluelab Powerpod, dosing cable, 1 x input power cord (country specific type), water cover, 4 x output power cord, 4 x mounting screw
Made in New Zealand and manufactured by Bluelab, the industry leader in hydroponic testing equipment, built for growers; 2-Year Limited Warranty with proof of purchase
| SELLER | SELLER SCORE | AMAZON FULFILLED | PRIME | FREE SHIPPING |
|---|---|---|---|---|
| Tetraponics | 0.00 | ✅ | ✅ | ✅ |
Proportional smart feed control for efficient dosing without overtreating
3 multi-speed pumps for pH control and nutrients (1 pH control and 2 nutrients OR dual pH control and 1 nutrient
Designed and assembled in the USA with USA-based customer support.
Compatible with hydroponic systems ranging from 75 to 500 gallons. Included power adapter compatible with 110-240V AC electricity
Here is the list of top-rated brands that were evaluated by PM.
| Brand | Count |
|---|---|
| General Hydroponics | 5 |
| Microbe Life Hydroponics | 3 |
| Bioag | 2 |
| Bloom City | 2 |
| Bluelab | 1 |
| Chemboys | 1 |
| Humboldts Secret | 1 |
| Superthrive | 1 |
| Tetraponics | 1 |
We've carried out a comprehensive analysis of 11,522 reviews on hydroponic ph control, using our selection criteria to identify the best options in the categories. Our findings reveal that most customers typically select hydroponic ph control priced around $117.76, with top brands including bioag, general hydroponics, microbe life hydroponics, viagrow, bluelab, agrothrive, ecoclean solutions, superthrive and clonex and atlas scientific environmental robotics
Our team of expert editors reviewed these high-quality items and handpicked the top 17 hydroponic ph control for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the categories category. These include usahydrogardening, growdots, jlc hydro supplies, amazon.com, srs inc, granite supply, ecoclean solutions, atlas_scientific and bloom city and kimbloem .
We are dedicated to assisting our users in finding the right fertilizers Products based on their needs, saving them considerable time when choosing which hydroponic ph control to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.