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ive had my tank about 1 month now. I have only 2 of my original 6 fish still alive and I think they are both circling the drain. I think my dwarf gourami may be attacking the fish. I pulled Amy small white Molly from the tank tonight dead. The platy and 1 of my guppies look injured. I had a dead platy last week. Remaining in my 20 gallon tank...1 dwarf gourami, 2 guppies (1 of which is injured) a larger Dalmatian molly, and my sick platy. My nitrites are about 2.0 and ammonia .25-.5 pH 7.4 nitrates 5.0. I bought 6 fish initially, had some deaths while I was learning the water cycle. Had 3 neon tetras not last 10 hours in my tank (ph may have been off for them? Guess they like more of 6.4-6.8 range). I don’t want to get more fish til I figure out the water and death cycle. Should I remove my gourami?