LoachTruther Posted March 6, 2021 Share Posted March 6, 2021 I have two tanks running with sponge filters. Both have stable parameters with pH around 7.8, Nitrites at 0, and nitrates around 30 ppm (hopefully these go down as my plants settle in). Every time I take a reading, ammonia is under 0.25 ppm, barely detectable, but still there. I've begun to wonder if I might be able to get them all the way to zero, and I have two ideas/questions about it. My first theory is about the sponge filters. The sponge filters I have are extremely fine with teeny tiny pores, and I've heard people say this can decrease their efficiency. I've watched the co-op videos and Cory's objection to fine-grade sponges is that they need to be cleaned more because they clog more easily, but he doesn't comment on whether they're less efficient than coarse sponges, even when properly cleaned (I squeeze mine out in tank water every other week). Does anyone know if switching to coarser sponge filters will help get that last stubborn bit of ammonia down? My second theory is about plants. I've filled each tank with as many plants as I can, do I just need to wait for them to settle into the tank and let them take up that ammonia? Link to comment Share on other sites More sharing options...
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