My snails keep dying and I'm not sure why.. Maybe possible starvation? I've noticed that before they die, they kinda slow down and stay in once spot. Sometimes falling off the glass and then I try to help them back onto it. Right now the tank doesn't have any fish in it, so I haven't really been feeding. However there is a bit of algea growing on the rocks.. Water parameters seem fine.
PH - 8.0
Ammonia - 0
Nitrite - 0
Nitrate - 0
Phosphate - 0.25
Temp - 77.8
Salinity - 35
Here is a picture of one of the snails that I say is in a "slow down" state..