Best Fish Aquarium Water Treatments in 2026

Delivers the nutritional benefits of raw garlic to fish when used as directed

Consists of preserved extract of raw garlic with vitamin-C as a preservative

Does not require refrigeration

Highest porosity and largest useable surface area, per unit weight or volume, of all filtration media available

Designed to be used in marine and freshwater aquariums with a pH of 7.5 or over Provides large amounts of anaerobic surface area for bacterial colonization for denitrification, and sulfur doping to act as an electron donor to accelerate the process in freshwater, ponds or marine applications

Provides over 71,000 square feet (6,596 square meters) of surface area per liter of medium; one brick has about 100,000 square feet of useable surface area for bacterial colonization

Multi-component automatic buffer that regulates pH for a more stable aquarium

Helps increase pH stability by raising the alkalinity

Provides a good source of carbonates

Widely used by professional coral farmers to increase growth rate and coloration.

Beneficial to all corals, as well as solitary and colonial polyps.

Encourages formation of new tissue and repairs damaged tissue during fragmentation and propagation.

Professional strength live tank starter nitrifying bioculture for rapidly cycling new marine and fish and reef aquaria and brackish aquariums in 5-7 days

Does not require refrigeration unlike any other live tank starter

Prevents “New Tank Syndrome”

Kalk+2 is an advanced Kalkwasser powdered supplement enhanced to include not only the traditional calcium hydroxide, but strontium hydroxide and magnesium hydroxide also.

Contains calcium, strontium, and magnesium in the same ionic ratios found in aragonite. This unique feature increases the usefulness of Kalk+2 to reef-building invertebrates such as corals, clams, calcareous algae, etc.

Provides temporary alkalinity and helps maintain pH within the desired range when used as directed.

Encourages health, growth, reproduction, and vibrant coloration.

Widely used by professional coral farmers to increase tissue growth rate

Provides important nutrients to corals and their allies during periods of stress induced by changes in lighting and/or prolonged exposure to excessive water temperature (often resulting in “bleaching”)

Concentrated iron supplement that helps many algae and plants including hermatypic organisms (corals, clams, and their allies), macroalgae, coralline algae, mangroves, marsh grasses, and more

Suited to systems outfitted with a refugium or mud system

Composed of purified water and high purity materials

Encourages health, growth, reproduction, and vibrant coloration.

Widely used by professional coral farmers to increase tissue growth rate

Provides important nutrients to corals and their allies during periods of stress induced by changes in lighting and/or prolonged exposure to excessive water temperature (often resulting in “bleaching”)

Eliminates reactive phosphate immediately upon addition to aquarium

Safe for all inhabitants of reef and marine fish-only aquaria; May be used on an ongoing basis to help control phosphate in heavily-stocked aquaria

Each ml eliminates 1 ppm phosphate in 4 US-gallons of water

Used by professional coral farmers along with CoralAmino & Restor for coloration

Provides numerous elements important to the formation of various biochromes to aid coloration characteristics

Formulated to provide trace quantities of elements for gradual incorporation into, and formation of, biochromes known to occur within zooxanthellae

Complete multi-nutrient with iron, cobalt and molybdenum for chaetomorpha algae growth

For all Marine and ULNS systems; Phosphate and nitrate free

Provides 13 elements critical to long-term health, growth & coloration of aquatic plants

Concentrated 15X Suspension of LIVE non-pathogenic microbes, specifically formulated to extremely rapidly establish biological filtration in new aquarium set-ups, and to enhance the rate of nitrification in existing systems.

Useful for rapidly re-establishing nitrification bacteria in case of an emergency

Particularly useful in aquaria with high population densities and when adding new fish. Supplied in a proprietary base which provides for maximum longevity.

Micro-Blast is a nutritious, balanced diet for sponges, anemones, gorgonians, small polyped soft and stony corals, clams, feather dusters, tunicates and other fine filter feeders, developed over years of testing.

It provides for growth and increased coloration, by providing all of the essential amino acids required by invertebrates, naturally occuring marine lipids.

It also provides rich bioavailable pigments including chlorophyll, carotenoids, and phycocyanin, containing beta-carotene, beta-cryptoxanthin, lutein, xanthophylis, zeaxanthin, canthaxanthin and other pigments for coloration.

Unique complex that provides trace & minor elements that benefits discus & other similar fish.

Replaces minor & trace elements that are lost through chemical filtration.

Made with purified water and high purity materials.

Helps maintain a balanced marine aquarium by enhancing the rate of microbial growth and reproduction, increasing the rate of phosphate-reduction and denitrification

May be used to help expedite biological filtration in new set-up; encourages polyp-expansion in all corals

Replaces “vodka method” of microbial activity-enhancement with a completely safe and biologically-sound, non-flammable alternative to using vodka or ethanol

Macrodiet suspension of marine crustacean roe utilized to promote long-term health, growth and improved coloration in anemones, corals, planktivorous invertebrates & fish

Rich in essential amino acids and vitamins for fish

Appropriate range of particle sizes for feeding many species

Ideal for use as a substrate in shrimp biotope aquaria, ~1mm particle substrate

Natural volcanic ash with beneficial properties for aquatic plant growth and long-term care of fishes and motile invertebrates requiring slightly-acidic, low-GH water conditions

Binds elements that contribute to hardness, lowering general hardness and resulting in a slight acidification of alkaline water to a pH of less than 7

Complex of 20 free-form amino acids found within tissues of fish

Encourages vibrant coloration, formation of new tissue, speeds up growth rates & encourages new tissue growth

Beneficial to all marine & freshwater fish