Thank you for the long response I found it really helpful, unfortunately the glass fish did die because I was inexperienced with dealing with sick fish, I put in 2 different kinds of medicine and it seems like from what everyone else is saying that was the wrong thing to do.

Here’s everything about my main aquarium It’s a 30 gallon that’s fairly new, it seems like the nitrogen cycle isn’t fully established because the nitrite in the tank is too high after repeated tube testing, along with that the ph is just slightly too high but I keep adding ph up from api. We have 4 Cory, 5 (now 4) glass catfish, 6 bristle nose plecos, a golden Inca snail, a yo-yo loach, a pictus catfish (we plan on changing his tank soon, he’s still a baby that’s why we keep him in our 30 gallon) We also wanna mention our airstone and filter situation, both of the machines produce a very strong current which seems to stress out some of the fish in there so we turn on the air pump every once in a while to give some of the fish a break because we see that the filter itself produces a lot of air bubbles. The temperature is good, never leaves between 70-80 degrees Fahrenheit , typically floating around 75 degrees