You know those little snails that come with every plant you buy? Why are
they considered to be a pest? Don't they virtually eliminate algae on
plant
leaves? What is everyone's opinions of them? Are they beneficial to
planted
aquariums, or are they a nuisance?

Marty

They add to your bioload, multiply worse than rabbits, require occasional
intervention of removal....

pain, not a pest... more of a pain....