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I had an established 3 gallon betta tank he got popeye I think from being too cold this winter. He was getting old for a betta. I euthanized him and the tank set for about 3-4 weeks now. I've still been doing some water changes and top offs. The ammonia has skyrocketed and will not drop or goes right back up. It's the darkest blue rating on the test. There was nothing else in the tank. I use prime for wc. There is some driftwood and java fern in there. The fern is doing great.
Should I start over or remove substrate? Where is this ammonia from? How can I get it back down for a new betta?
Should I start over or remove substrate? Where is this ammonia from? How can I get it back down for a new betta?