[whatcaneyedo]

This is quite interesting. I never have had a problem in the past with hair algae so I never bothered measuring my phosphate levels until about a year ago out of curiosity. With an elos kit they were .75 last August! I've been running at least 250ml of rowaphos and changing it at least every 4 weeks since then (I've also bought a larger skimmer and doubled my water changes). I've brought my phosphate level down to .01 so far but now I'm having a lot of trouble keeping hair algae under control. I find that if I blow torch it off a rock really well it wont come back but the amount in the tank that I cant torch just keeps growing and thriving. Once my current supply of rowaphos is finished I'm going to give some of the BRS HCGFO a shot and see how it does.