Best Fish Aquarium Water Treatments in 2026

Kordon methylene blue 4oz

Methylene blue is effective against superficial fungal infections of fishes

The drug may be used as an alternative to malachite green for the control of fungus

ENHANCED HEALING: Adds a multi-layer slime coat, Vitamin B12 & Echinacea to help heal fish with missing scales, frayed fins, and bruises. Additional polymer colloids act as a carrier for medications, making them more effective.

EASES STRESS: Calms fish and eases stress, making it an ideal solution to protect fish and reduce fish loss during handling, illness, new introductions, and shipping.

SAFE & EASY: Safe for freshwater and saltwater fish, invertebrates, corals, live rock, and plants. Use in medication baths, quarantine tanks, or for added protection during handling and shipping.

Instant Detoxifier: Highly concentrated formula instantly detoxifies harmful ammonia, nitrite, and nitrate in aquarium water, also removes chlorine, chloramines, and other toxins from tap water.

Makes Tank Water Safe: Use directly in aquarium during water changes, while cycling fish tank, overcrowding, overfeeding, or when nitrogen levels become toxic. An emergency must-have for any aquarist.

Works In Any Aquarium: Use Amquel Plus fish tank conditioner with any freshwater and saltwater aquarium, including planted aquariums, reef tanks, safe for all aquatic life. Does not alter pH.

DETOXIFIES FAST: Quickly removes and neutralizes chlorine, chloramines, and ammonia from water. Makes tap water safe for aquarium needs.

ONE STEP CONDITIONER: AmQuel is the original one-step Instant chlorine, chloramine, and ammonia remover. Use when changing or adding new water or in emergencies when ammonia levels become toxic.

SAFE & EFFECTIVE: Safe for all aquatic life, including live plants, corals, snails, and shrimp. Effective for both freshwater and saltwater aquariums, does not alter pH and contains no phosphates.

DETOXIFIES FAST: Quickly removes and neutralizes chlorine, chloramines, and ammonia from water. Makes tap water safe for aquarium needs.

ONE STEP CONDITIONER: AmQuel is the original one-step Instant chlorine, chloramine, and ammonia remover. Use when changing or adding new water or in emergencies when ammonia levels become toxic.

SAFE & EFFECTIVE: Safe for all aquatic life, including live plants, corals, snails, and shrimp. Effective for both freshwater and saltwater aquariums, does not alter pH and contains no phosphates.

POWERFUL DETOXIFIER: Keep your pond water safe and healthy by quickly detoxifying harmful ammonia, nitrites, nitrates, chlorine, chloramines, toxic heavy metals, and other organic compounds.

MAKES POND WATER SAFE: Mix in tap or well water - or add directly to pond when adding new water, performing water changes, during initial pond cycling, or when nitrogen levels become toxic due to over feeding or crowding.

CONCENTRATED FORMULA: Treats 2.5 times more water, providing a cost-effective solution for maintaining water quality in larger ponds and water gardens. Will not interfere with biological filters, reducing issues with “new pond syndrome” while keeping nitrates low.