Is Nitra-Zorb worth it?

It is worth it if nitrate or ammonia keeps climbing between water changes and you have a canister filter. It is not a substitute for water changes or for fixing overstocking and overfeeding.

How often do I recharge it?

Soak the pouch in a solution of 4 tablespoons (80 g) of salt in 8 oz (240 ml) of water for 2 hours, about every two weeks. Replace the pouch after roughly two months.

Will it work in a hang-on-back filter?

It is designed for canister filters, and the pouch is bulky for most hang-on-back media chambers. Check your filter's media space before buying.

Does it remove phosphate too?

No. It is phosphate-free and targets ammonia, nitrite and nitrate only. Use a separate phosphate remover if that is your problem.

Can I use it in a saltwater tank?

No. It is made for freshwater aquariums.

When is the price lowest?

The best new price found is $16.38 at Amazon as of November 4, 2026, with only one store listing it new. With a single seller, discounts are uncommon, so buy when you need a replacement rather than waiting.

Where is the API Nitra-Zorb Filter Media cheapest?

At Amazon, for $16.38, as of our latest check.

API Nitra-Zorb Filter Media

Best price now

$16.38at AmazonObserved at 1:15 AM

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Our take on the API Nitra-Zorb Filter Media

API Nitra-Zorb is a rechargeable filter pouch that removes ammonia, nitrite and nitrate from freshwater aquariums. It fits most canister filters and can be recharged in a salt solution about every two weeks, then replaced after roughly two months. The 7.4 oz pouch is phosphate-free. Its best new price is $16.38 at Amazon as of November 4, 2026, the only new listing found.

Best forFreshwater tanks with rising nitrateKeepers fighting ammonia or nitrite spikes