I have a nerite snail and a betta in a 10 gallon aquarium. There is some algae, but I don't think it is enough for the snail. I've tried putting algae wafers in - if it's during the day, the betta just demolishes it; I put one in last night but the betta still looks a little too pudgy. I feed the betta NLS pellets once daily, so he definitely shouldn't be hungry. How do you feed your snails? How can I ensure he gets enough to eat, without over feeding my betta? Thanks!