Again, your Ammonia and Nitrite are too high. You have to do bigger water changes and daily. Don't have to test for Nitrate until you get the other two under control at 0. This really isn't a game of "it is getting better" because any amount is harming and stressing the fish.
I just got this from the section below on Member tanks... think of it this way, we are not fishkeepers as much as we are waterkeepers. Keeping fish in tanks is completely artificial. Tanks are prone to pollution because of their size and the number of fish we keep and it is our responsibility to deal with it for the fish health and welfare. I like this perspective to reorient us to the water and environment rather than the fish themselves.
