Yikes, sorry to hear you are still having such a battle. I'm not up to date on what you've been up to, but I know you changed from MH to T5, and you also switched from vodka to bio-pellets?
Were you having nutrient issues? It sounds to me like you are, seeing as the low pH level. Do you use GFO? Are you seeing any cyano or just the hair algae? What skimmer are you using? Have you tested for ammonia, nitrate, and phosphate?
If it makes you feel any better it still looks good from far.
