Snails

The very tiny snails that look like flat spirals are a type of ramshorn snail. I have them. They are common hitch-hikers on plants. I gave up trying to get rid of them years ago. They are not a problem in themselves, they just look a mess if you get overrun with them. The way to keep them under control is to be careful about how much fish food goes in the tank. If you overfeed, the snails will go mad and take over. Feed the fish just what they need, no extra - and fish need less than you'd think.

Of course, you may not have ramshorns, here is a site to ID your snails. The ramshorn snails in the link are the big ones but there are several species, some of which stay tiny.

But by and large snails are not a problem, just unsightly.



I also have nerite snails in my tanks which I bought 

Thanks for that link Sue, very helpful. I was wondering a bit about the snails in my tank and what types they were.

Now I can see that I've acquired a couple of the Malaysian trumpet snails and quite a few small nerite snails, all hitch-hiking into the tank on the plants I would imagine

They aren't a problem at the moment as I'm careful with the amount I feed the fish.

Having read your post to jesnon in the fish ID section and googling tadpole and bladder snails, I'm far more inclined to think that it's those that are in my tank rather than nerite snails

I still think the others are trumpet snails, my substrate is mainly sand so they could be quite handy. Thanks for your help as always