Is this GHA or somehthing else?

[LesPoissons]

Hi all,

engaged in a months long battle with this junk. Is it GHA or something more sinister, because I have tried a ton of things to rid myself of it. (Fluconizole, blackout (terrible idea btw), no white light, 0 nutrient tank, algae scrubber, carbon dosing, manual removal, tangs/algae blennies/sea hares, refugium etc.

Had it almost eradicated under only blue lights in a near 0 Phos/nitrate tank. Tried turning whites back on at 1% for 5 days- thinking my 3 tangs and cuc and algae blennies would keep new growth under control- so very wrong.

Thanks

 

[Ranjib]

GHA i think

 

[Bryson.bobby]

Looks like GHA. I would raise my po4 and no3 if I were you. Would much rather have gha than dino.