Assassin Snails Reproducing Too Much

I had a snail problem in my 80 litre aquarium, the populations of pest snails (which came in on a plant) and  Malaysian Trumpet Snails (which I bought to aerate the sand) were out of control, there were so many.

I decided to introduce 5 assassin snails to deal with the problem. I have had assassin snails in the past, I think I had 8 in a 120 litre and I never had a problem with them reproducing, so thought it would be fine.

This was 3 months ago. Now the population of the other snails is almost gone, and the assassin snails are reproducing like crazy. I have seen a number of small assassin snails around the aquarium, and 2 pairs of assassin snails are frequently stuck to each other.

I am now worried that the assassin population will get out of control now! They are digging in the sand way more than the trumpets did which is useful, but I don't want hundreds. Based on things I have read, I thought that it took ages for the eggs to hatch and the snails to grow (which is why their populations can never get out of control), but this doesn't seem to be the case.

Does anyone know if an assassin snail population can get out of control or how to prevent this? I do have 2 other aquariums I could move 1 or 2 into to stop them breeding, but I am concerned that they might go for the nerites in those aquariums. Can they eat nerites?

Thanks!

I won't put them in with the nerites then! Good to know that I can sell them if I end up with too many.