Hello and :welcome:, snails do come in with plants, that is why one should also quarantine plants as well. They will dwindle out if there is not enough food. All I do it remove snails about 10-20 a day and feed less. After a while the snails will reduce in numbers as well, but it takes time. The ramhorn snail which lives in the ground is however a good one as it digs and turnes over the substrate. Any chance of photo of your snails so we kow what you are dealling with ? Generally I never use chemicals to kill snails as they die and pollute the water. cheers jk :thumbup: