slug n snail

[Dorado]

Hi fellow reefers,

Last nite 3 hours after light off, I discover hundreds of small slugs and snail on the glass of my 4ft tank. Make me worried that 1 small snail which look like garden snail on my orange monti cap and I check the monti today and look fine.

Is the snail and slug harmless? Try to take pics but no light so all the pics look bad.

Will try tonite and post in this thread.

[Dorado]

Here the best pix which i try to take.

[Dorado]

This is the pix where you can see the white patches on the glass wall. I will try to scoop some and takes pix tonite. Reefer Guy tell me to discard it but looks like it keep my glass clean. My only worries that it getting more and more, scared it will have side effect on my SPS.

To play save should I kill it?

[Fuzz]

Anyone got any ideas what these slugs do?