Ken, marie is dead right, your ha needs to be manually removed or the eying algae produces its own pollution.
Pull it all out even if it takes all day, refresh your gfo and clean your Skimmer. It will dossapear soon.
Hanna for phosphate to get a real reading.
Go blackout for 3 days minimum...no ambiant light.
Prodibio works but it wont harvest your algae you need to do that yourself, if you don't it takes ten times longer just waiting for it to die off
