I’m new to planted tanks and have done as much research as I could to make sure I did everything right. In my 20 gallon tank I have: 1 Betta, 1 Oto catfish (I’m trying to get more for a small school, but the local fish stores have been out of stock), and a ton of what I assume to be bladder snails.
The snails seem to be doing well, except I noticed that three of them have clear shells and a red body. Should I be concerned? Is it an illness, or just a form of albino?