After reading through this thread many times and battling algae for almost a year, I have decided to try AlgaeFix Marine. Thanks for the time everybody has spent posting in this thread, because I wouldn't have tried without it.
I have a 90 gallon tank with approximately 100 gallons total. It has been setup for almost 6 years now and it's been pretty successful over that time. I currently have mostly softies (Xenia, Misc. Mushroom, Riccordea, Leather, Kenya, GSP, Misc. Zoas, Clove Polps, Yellow Polyps) a Green Bubble Coral, Favia Frag and a Blue Maxima Clam. There are also misc. Hermit Crabs, Turbo Snails, Tiger Conch and a CBS. In my refuge, I have Chaeto and 8 Mangroves.
I had an algae outbreak a few years ago that GFO was able to remove. But, it had come back about a year later, even with GFO. A added 500 ml of WM pellets along with 1/3 lb of GFO (swapped regularly). Using a turkey baster, I have been able to blast alot of the algae off the rocks and some areas of the glass. But, it just doesn't seam to have taken care of all of it. There is some GHA that just doesn't seam to want to go away. I have been checking my NO3 and PO4 and the NO3 has gone down from around 5 to now undetectable, while the PO4 has read 0.00 on a Hanna Checker. I beleive that there is PO4 leaching from the rocks and being used by the algae before it can be detected. So, I'm leaving both the GFO and Pellets online. Hopefully as the algae dies off, the PO4 will leach out and get pulled from the water with either the GFO or Pellets.
I started my first dose of 10 ml last night and will keep everybody posted on my results.