Non-branded foam but suitable for Aqua Clear 110 / 500 Filtration Systems.

Package included: 6 Pcs Replacement Foam.
Features
Traps Particles & Debris Enhances biological filtration
Enhances biological filtration.
Provides efficient water flow with less clogging for long lasting filtration.

Note:The sponge itself is white, and the white object is exposed for a long time and an oxidation reaction occurs.
Therefore, yellowing and discoloration are normal phenomena.
The usual method of storage is to put it in a cool place and seal it with a black bag.