Test your water right out of the tap. You have nitrites and nitrates this tells me alot. Nitrites are bad bad bad, if you have them change water until they are gone. If you didn't have fish I would say let the tank cycle until nitrite is gone. Changing the water and removing the nitrite will slow the cycle but save the fish kind of catch 22. Your tank is obviously cycling and since there is no ammonia its past the half way point. (Atleast the pic looks like the ammonia is fine, can't tell for sure) are you on city or well?
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