- 100% Brand new and high quality
- Size: Approx. 30x 15x 2cm (L*W*H)
- This product is suitable for seawater, fresh water, water tanks, size can be cut freely.
- Dense hole clearance and softness, and through expert analysis is the best to cultivate good hotbed of nitrifying bacteria.
- On the biochemical cotton waste and feed residue, improve water quality filter clean. Best effect, reduce the fish mortality.
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