It’s best to only use chemicals as a last resort after trying other natural solutions. [3] X Expert Source Aaron BernardFish & Aquarium Specialist Expert Interview. 17 July 2020.
Snails can also be picked out of the aquarium as they are seen. This is most effective when there are smaller number of snails. However, since snails are mainly nocturnal it may not make a dent in the problem. When snails hatch, they are quite small and can climb up the sides of the aquarium. Use a small diameter hose like an air pump hose and start a siphon. Just go along and suck the little ones out. It may need to be done more than once to remove them all, though you can pull out 100 in a couple of minutes. Repeat the process in a few hours.
Assassin snails will also eat their snail brethren. [7] X Expert Source Aaron BernardFish & Aquarium Specialist Expert Interview. 17 July 2020. They don’t reproduce as readily, so generally don’t become a problem like other snails.
This can be a bit harsh on certain plants so there is no guarantee that it won’t harm the plant. You can also place plants in a killing solution of aluminum sulfate and water. [10] X Research source Add 2-3 teaspoons of aluminum sulfate to a gallon of warm water and stir to dissolve. Submerge the plants in this and let them sit in this for at least 2-3 hours but up to 24 hours. When you remove the plants, rinse them well before adding to your aquarium.
