Freshwater
Snail Prophylactics

The following three methods are useful to guard against unwanted snails:

1. Use "Had-a Snail" freshwater snail control. Added directly to your aquarium, it kills snails and parasites and might guard against algae spores.
NOTE:
Live plants should be removed during treatment.

2.
Clown loaches will keep snails well under control.
3.
  Alum is also useful. Look for "Alum U.S.P." at the drug store. Soak the plants in a gallon of water that contains up to 10 teaspoons of Alum. The Alum kills microscopic bugs. Longer soaks (2-3 days) will kill snail eggs and/or snails.