I change 2 gallons every 2 weeks since the bio load isn’t big I have
3 trocus snails
5-9 blue legged crabs
6 nassrius snails
20 dwarf cerith snails
I finally dug my hands into the bottom of all my chambers of my AIO and I had a bag of chemi pure blue in there I thought I removed could that have been an issue? I also have neo phos and neo nitro if I need to use it
I removed my chemi pure blue because it was dropping my phosphate to zero. I don't know if that's the norm though.