Uh-oh. Snails need help
Yesterday I spot treated algae that is growing on my rocks with H2O2. I used the Equate brand peroxide. about 90 mls for a 30 gallon tank. I turned off the pump and squirted it directly on the rocks. After there were only a few bubbles left and hour or so, I turned the pump back on. There must have still been some peroxide left because I started seeing bubble form on a lot more untreated surfaces.
Now three of my four nerites are retracted (but don't stink yet), and the one still moving about has turned dark.
What can I do?