Wow that looks like a nice tank. I am considering upgrading to a bigger tank. My 20 gallon is at max capacity according to my local petco I found a tank I like on Facebook marketplace that I might go take a look at thats not 2 far from me if it’s still there by Monday.
Hey there I don’t know much about neon tetra disease but from what it sounds like the neons are dying anyways. I don’t know if it can spread to other fish.