Hikari Ultimate Water Conditioner

Hikari Ultimate is a complete, professional-grade water conditioner that makes tap water instantly safe for both freshwater and saltwater aquariums. Built around ClorAm-X, the same trusted formula used by serious hobbyists, it does far more than a basic dechlorinator and is available from a 1 oz starter bottle up to a money-saving 1 gallon jug.

Why Ultimate

• Destroys chloramine and instantly removes chlorine
• Eliminates and detoxifies ammonia
• Detoxifies nitrite and heavy metals, including copper
• Selectively replaces the protective slime coat only where it is missing
• Adds essential electrolytes and gently buffers the water
• Reduces stress and instantly "ages" new water
• Works in both freshwater and saltwater systems

How to Use

Add Hikari Ultimate to fresh tap water with every water change and whenever you set up a new aquarium. Follow the label dosing for your tank volume. Always condition replacement water before it goes in with your fish, never dose chlorinated water directly into a stocked tank.

Choose Your Size

Specifications

Pairs Well With

Keeping a betta? The single-dose Hikari Betta Ultimate is the perfect bowl-size version. Compare other trusted conditioners like Seachem Prime and Fritz Complete, and cycle new tanks faster with FritzZyme 7 live nitrifying bacteria.

Browse more in our Hikari collection, Additives & Supplements, and the Freshwater and Saltwater collections.

FAQ

Can I use Ultimate in both my freshwater and reef tanks?
Yes. Ultimate is formulated for freshwater and saltwater aquariums, so one bottle covers every system you keep.

Does it remove chloramine, not just chlorine?
Yes. Ultimate destroys chloramine and locks up the ammonia released when chloramine is broken apart.

Which size should I buy?
Match the bottle to your routine: 1 oz or 4 oz for small tanks, 16 oz for regular water changes, and the 1 gallon for the best value on large systems.