how big of tank, and just how badly over run is it with pest snails? 2 assassin snails can only work so fast, and eat so many pest snails. i bet you dont have to worry about feeding them for a long long time.
for bn, if they can somewhat hide and feel protected, when ready they will breed. in my case, i do my best to move or remove anything they can use for a cave, and i keep having tiny plecos show up.🤪