It looks like snow

[txrunning1]

I have a 75gal tank, lr, dsb, cleaner crew, tang, blenny, mandrin, percula, snowflake, cuke, and a couple of anenomies. Lately I have noticed a bunch of white stuff flying around the tank. It looks like loose sand, but when it attaches to the glass it crawls around. It must be some kind of living organism, but what could it be? And what can I do to correct it?

 

[jakob4001]

most likely those are copepods; not harmful to your tank;your mandarin will appeciate those being in your tank and will consume those as main diet