So I have been cycling a 36 gal. tank for about 12 days with fish. Since then, I have learned I am overstocked and have wrong fish for cycling (4 dwarf gouramis, 5 glofish tetras and 1 peppered cory). Anyhow, I am doing almost daily water changes to accommodate the population. Most of my ammonia readings each day have slowly risen close to 1.0. With each daily reading, I am doing about a 20-25% water change. I am treating each water change with Prime and keeping temps as level as possible. Trying not to overfeed also. However, this morning my ammonia reading soared to a shocking 4.0! Terrified for the fish, I immediately did a 50% water change and treated with Prime. Checked about 7 hours later and levels are still at 2.0. Did another 15% water change and now levels are still about same? What else should I do? I added a little extra Prime since this seemed to be sort of an emergency. Needless to say the fish will be fasting tonight, but not sure if I should do yet another sizable water change again this evening? Would welcome feedback.