I started using GFO a little over a year ago and it really helped knock out my algae problems. I was running the recomended dose of 1tbs per 4 gallons in a Little fishes reactor. My coral growth was terrible and I couldn't even grow coraline algae on my back glass. I ran out of GFO about 2 months ago and have not bought any more as to see what would happen if I quit running it 24/7. Within 2 weeks I had coraline on my glass and rocks, and within a month I had new growth on ALL my corals. Here we are 2 months later and my back glass is covered with coraline and my corals are looking great. Do you think I was running too much GFO or running it too often? I know they debate about what other things GFO leaches from the water beside nitrates, I now know this to be true. What experiences have you had?