If you want a really good mental image, my nerite snail is in the words of my psychiatrist "addicted to algae wafers". When I had my betta tank, I would give the snail about half a wafer maybe twice a week, and he would work his way under it, flip himself upside-down, and eat the wafer in such a way that as it disappeared, it would flip him back over. Monday, I tossed a whole wafer in, thinking now that I've got Energizer and three corys, they would all eat at it and it would be fine. Heck, no. The corys nibbled at it, but none of them can eat and sit at the same time, so they have to do laps between nibbles. Energizer found it and sat on top of it to eat it. Any time the corys came near him, it was on. He hit one and got one in the eye with a feeler. He ate a good 95% of that wafer. Woke up this morning and was startled by the look of one of my caves. One has a skull on the front, and it honestly looked like someone had shot it while I was asleep. Look closer to find that it's Energizer sitting over what yoga calls the "third eye" just chilling there, looking like a black bullet-hole. I would love to get another snail, but if I put in another snail like Energizer, along with the corys, it might be War of the Algae Wafer in my tank.