I don't want to say yes but it does look like white tiny balls. So that's not normal. Huh. Three days of 50 pwc will remove them but how to prevent it? I did a 30 pwc yesterday should I start today at three or just two more pwcs? Thanks.
Generally a bloom is caused by cleaning your tank TOO good IME and the bacteria float trying to find a new place to live. I'd suggest doing 2 more and see how it looks. Some have said if you let it be, it'll go away on it's own, but I found that didn't work for me the last time it happened.
I try to break it up, one week vac part of the gravel and clean one filter and the next time a different part of the gravel and the other filter. Also when you clean out your filter media, you rinse it in used tank water and not tap water correct? Tap water kills bacteria.