Snail ID

[SeaHorse_Fanatic]

First one definitely looks like a sundial snail. Just to be safe, catch out all those ones and get rid of them IMO.

[Myka]

The first one is a Collonista Snail - harmless. The second with the tube as the front that you describe sounds like it may be a type of Whelk - which is usually not good.

Here is a Sundial snail:

[Ron99]

+1 to Collonista snail. I've always had bunch in my tanks that come out at night. Sundial snails have a more textured shell.