ok ive been keeping assassins for around 8 months now. they have layed eggs everywhere in my tank. but ive never had any baby snails. the eggs never hatch and ive had a problem with them making the stems of my plants rot when they start to break down. ive decided I want to move them to another tank and put in my nerite snails instead. can anyone advise on weather this would be safe or not. and also why ive never had any baby assassins. thanks.