My betta and my corys like algae wafers, so depends on what's in the tank. My Black Neons keep trying to get to the algae wafers for the corys in the big tank.
Are your fish able to finish whatever they go after, or do they leave some of it behind? Snails don't need a whole lot, relatively speaking. My snail will grab the algae wafer, but when he's done with it, there's still, like, 2/3 of it left or more. If he gets to the food first at least a couple times a week, he's fine. You can also wait to feed until he wanders closer to where you feed, or drop it where he's hanging out, if you want him to get it first.
100g planted community tank
75g planted goldfish tank
29g planted betta community tank
5g planted Betta tank