API Nitra-Zorb Aquarium Canister Filter Filtration Pouch, Size 6

These pouches are size 6, and are designed to work with tanks up to 55 gallons.

The actual pouch is 7 x 7 inches square, but because of the media, the final dimensions are 7 x 6.5 inches. The pouch is sized to sit nicely in one of the baskets of the Filstar canister filters. All of the size 6 pouches (Phos-Zorb, Nitra-Zorb, Bio-Chem Zorb, Activated Carbon, etc.) will be this size. This pouch does not have any stiffness to it, and may easily be placed in the back of a hang-on-back filter, or other sizes of a canister filter. If the filter is very small, the pouch can be cut open and partial contents can be put into a small filter sock.

API NITRA-ZORB filtration should not fully replace other media; it is for temporary use only.

API NITRA-ZORB specifically works to target and remove ammonia, nitrites, and nitrates from your aquarium, all of which are harmful at high levels for your fish. Use API NITRA-ZORB if these levels consistently spike. Contrarily, API BIO-CHEM ZORB works to remove more general aquarium pollutants, such as colors, odors, heavy metals, and toxic gases. API PHOS-ZORB specifically targets phosphate and silicate in aquarium water.