TropicAqua Pre-Filter Sponge Pads Compatible with 300 GPH Pump Filter Box (Part No 52231 52229) — Coarse & Fine Replacement Pads, Pack of 12

Fits Universal Pump Filter Box or Complete Filter Kit with 300 GPH Pump — replacement sponges for Part No 52231 and 52229 (Pack of 12). These TropicAqua pre-filter sponge pads provide mechanical filtration by trapping debris and particles to improve water clarity. The set includes coarse pads to intercept larger debris and fine pads to catch smaller particles, helping prevent clogs and prolonging the life of your filter box. In addition to physical filtering, the sponges offer ample surface area for beneficial bacteria to colonize, supporting biological filtration and a healthier aquatic environment. Suitable for both freshwater and saltwater setups.