Yes, I was talking about mystery snails. They were the first snails I ever kept. I had a dark purple, magenta, and wild type. My tank was new and I went through every beginner tank problem you can name. I had bottle brush algae, diatoms, green spot algae, and hair algae. My snails would climb on a leaf and eat the bottle brush algae from around the edges of the leaves. They never ate the plant unless a leaf was dying. I still have 2 offspring from my wild type and dark purple mystery snail. I have added ramshorns and malaysian trumpet snails since then. I occasionally have some green spot algae show up and all the snails eat it. I have a ten gallon that developed a hair algae problem when I let my CO2 run out. I put an ivory mystery snail baby in there and some ramshorns. They are eating the algae and it is almost gone. I feed them plant wafers once a week. They do eat what fish food they can beat the fish too.