How to let built up O2 out of sand?
My substrate is organic topsoil topped with white silica sand.
I just pulled up my almost dead aponogeton to prune all the dead leaves from it and all I had were black roots. After I finished pulling it up lots of really big bubbles came out of the hole that my plant was in. I did research and found out that a buildup of O2 around the roots will cause them to decay.
So my question is how do I prevent this build up in the future? This has only been set up since February.
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Tank: fluval spec v
Fish: Green Neon Tetra, Cherry Red Shrimp
Plants: Dwarf baby tears