My soon to be betta sorority 29 gal is treated, stocked with corys and 2 snails. I opted for black mystery snails b/c they blend in with the black sand to hide from bully bettas. (Albino corys look great against black sand!)
I noticed my male's 2.5 gal gets dirty quickly; I then realized his blue mystery snail is the bioload culprit. This is a BIG snail. I have a smaller blue mystery in the 5 gal with my 2 girls, and the water is much more stable!
The big blue snail is going in the 29 gallon.
Long way to one question:
What is the bioload of a good-sized snail in compared to a betta or cory? We are all familiar with the "one inch of fish per gallon" rule; what's the snail equivalent?