Newbie question: Ick or pods? ...searching for answers

Hi, I have started a mini reef tank (20G) with some live rock, 1 clown
and some snails(recently added) due to a minor algae problem. A few
days ago, I've noticed some very small little whitish dots all over
the glass. I was concerned and asked the locals, they told me its pods
and is actually good for the fish.. I'm just wondering if this is
really pods or actually ick? since I don't know the difference. Its
all new to me and trying to read as much as possible but does anyone
know or can advise. The clown seems to be fine as I watch him
everyday... any suggestions?
thank you very much