I’ve gone through a couple of your previous posts, and you seem to be doing ok as far as taking care of the fish is concerned.
IMO, the biggest thing in keeping fish is water quality. I’m not talking about
NO2,
NO3, ammonia, or anything like that in the tank water. I’m talking about the quality of water right out of the tap. I will say this—when I first started (or restarted) the hobby, I was using tap water. All my fish died, but I chalked it up to inexperience. I decided to try
ro water, just to see what would happen. I put in some additives to create the perfect parameters, and used it for every water change. Ever since I did that I have not lost a fish (after a two week acclimation period) due to “unknown circumstances”. Now when I lose a fish have a pretty good idea why.
At one time I had two tanks going, a low pH, very soft Amazon blackwater tank and a high pH, very hard African rift tank. Both were flourishing. It could be that my tap water was horrible. It could also be the reason that some people seem to be naturals in fish keeping, some people have very good luck with certain species of fish (pH and hardness differences), and some people can’t keep a fish alive for more than a month.
As a fellow fishkeeper who lost more fish than I can remember, and now am actually able to keep them for months at a time, just let me tell you—Don’t give up!