I agree with most of what has been said....
DO
-cut back feeding
-get the plants healthy
-trap and remove (if you so wish) just throw a piece of lettuce or zucchini in the tank at night and before the lights come on in the morning remove it with the snails and repeat as you please.
DON"T
-add another critter to take care of another critter (I would certainly stay away from loaches if you want your shrimp)
-squish them (this adds more food for the other snails, bad cycle)
-use copper in your tanks ever. It absorbs into the silicone and can leach for years. Better to just stay away.
Things that I would like to agree with....
-snails are actually helpful for planted tanks if kept under control
-no food=no babies
-most snails do not eat plants but do eat the decay (plant or animal)
-keep the plants healthy first and everything else will follow
-nerite do lay eggs but they are not able to hatch in fresh water
-nerites and briggs are pretty and will out compete "pest" snails but only add them if you want them for them (personally i would not add snails to a shrimp tank again because they make a lot of waste and require more food to be put into the tank. But that'e just me and for breeding purposes)
I think I hit everything I wanted to hit.
