I still have problems with the ammonia that is still present, even with water changes it doesn't even get down a bit, so I got AmGuard from Seachem last weekend and tried it, it didn't work either, I did a water change yesterday (I do them every 72 hours), increase the dose of AmGuard a little and hope it works.
I also installed a small 10 gallon QT last weekend, I'm not sure what I can put here, it's possible that one or two very small fish or maybe some butterflyfish, since being less litrage, make changes of water to maintain the quality is much easier, preventing it from fighting with ammonia in that tank as well.