Has been awhile since i posted here. But need alittle advice. I have several different types of snails in my tank and some of them have laid eggs and they have hatched. I now have dozens of snails in my tank. Is it ok to leave that many snails in there??
The tank is a 75 gal with 20 gal sump and a 5 gal fuge.

I assume by dozens, that you are referring to 50 or less, in which case it's fine. Too many more than that and I'd recommend actively trying to give some away. Especially since there's a chance you'll get more breeding. You might try selling them in the trading post forum here.

Out of curiosity, what kind of snails are they?

Congratulations. Having newly hatched snails survive is difficult. I've had many clutches of Cerith eggs however none hatched. Well is your current cleanup crew doing a good job? If they are then there wouldn't really be a need for additional snails. However keeping a majority of them won't cause a problem depending on how many you have exactly. You could probably sell some or all of them to local fish stores for store credit.

Yeah I'm kinda curious how you got them to reproduce... water specs (salinity, temp, etc), lighting, substrate, I would love to get some snails to reproduce, particularly nassarius snails... instead of having to keep buying them.

At a $1.99 a pop, theres definitely some money to be made. Too bad you couldn't sell freshwater snails like that, lol.

As for what type of snail they are, i am not sure i think Cerith. Salinity = 1.23to 1.24. Temp = 78 deg F. Metal Halide lighting sys. Substrate = live sand.

I have not done anything special to my tank. I actually have some hair alge growing on the live sand. And my fuge has calupra in it. I know some say not to use it but it is doing quite well.

These snals have white shells with small brown spots. That is all i can tell u about them at this time. Most are very small.

And one more thing. I do not use the standard filtration. I let live rock and sand do most of that and i have some foam filters in the sump but thats it.

That actually sounds like the perfect breeding grounds for snails. The times that I have gone shelling, I have gone to the bays and shallow inlets with calm waters, and muddy/hair algae covered areas... and you can find snail after snail, as well as tons of eggs.

One time my brother and I dug what I thought was a boulder out of the mud... but it was a snail that measured almost a foot in diameter, and neearly two feet in length... in fact, I think I'll take a pic of the shell and post it below. Just think, one of them might end up this big...