cfosgate
Aquarium Advice Freak
Yes, I let mine build up. Kept my assassins happy for about 2-3 months then there were just no pond snails at all.
Yes! Assassin snails definitely eat MTS. I have a tank full of MTS and I added 10 assassin snails. They haven't wiped them out but have kept them in check since MTS are libebearers and breed so quickly.