I have a lot of snails and I'm wondering if they're good or bad for plants.
There are two kinds: ones that are kinda brown upto about a cm in length and
the shell is a spiral, cone shape. These look like pretty ordinary type snails
and don't reproduce as often as the other ones. They are small, 1mm -3mm in
size, semi-transparent shells in a spiral, disk shape. I can't observe any
obvious damage to the plants but I'm not sure. Does anybody know the names of
these snails? Sometimes I find a fairly substantial egg cluster on the top or
bottom of a leaf. I think they mostly eat algae. Are they good or bad? Are
snail species competitive? Can some kinds compete with more beneficial types
and even kill them off?