Help - White bugs? on glass

[xenia2]

Hi guys,

I just recently setup my fish tank like over a month. I noticed there are little white things "swimming" on the glass surface, I have no fish just zoos, mushrooms and leather corals.

What is it? is that a bad thing?

[NanoReefWanabe]

likely fine...just copods...your first fish will likely eat all but some of them...

[cherubfish pair]

They are a microcrustacean and if you have them it's a good indicator that your tank is in good shape. They eat the sea-crud that nothing else will and can get into very tight spaces that nothing else can.