Tetra Crystal Filter Cartridge

5 x Replacement Compatible Biorb Filter Service Kit Simply remove old media from your filter, retaining the plastic housing, and insert our media replacements, followed by the foam ring. This kit contains 5 x foam rings, and 5 x sachets of Carbon/Zeolite Mix.

Extremely quiet and powerful air pumps for increasing oxygen levels running airdriven ornaments and operating undergravel filters. Designed in conjunction