can anyone tell me what this is?

[Cheeser]

i had an algae bloom and i dont know what i should do.
what kind of algae is this?

 

[HeatherLynn]

it looks like some hair algae starting

 

[Bifferwine]

Dinoflagellates. Very nasty pest to deal with. I would do a blackout for about 4 days, removing as much as you can by hand each day, then do a big water change (like 30%) at the end of it. You may have to repeat this a few times... They are tough to get rid of. Another downside -- it is toxic, so your CUC that normally eats algae will stay away from it.

 

[Smitty]

+1 Biff..good luck ridding them, and stay persistent and patient.