I think I might be dealing with Dino’s. Phosphate and nitrates are zero and I read that is most likely cause of an outbreak. What I thought was diatom has turned to stringy reddish brown and bubbles(not huge bubbles like the pics if you google Dino). Any suggestions? I’ve started feeding a little bit more to raise phosphates but don’t want to swing the other way and have an outbreak of all kinds of other algae.