I'm loosing the war with GHA, help?!

[andrewsk]

Oh here is my guess to the problem.

Since it is growing exclusivly on your rocks, I think that they are the problem. Let me explain a bit.

If you have had those rocks for 3 years, they have had a chance to absorb nutrients over a long period. No matter how clean you water is, the nutrients are inside the rock.

Eventually they will all leach out and disappear if the water has less nutrients than the rocks. If the water has more nutrients it continues to build up.

I have a rock that has a huge crater in it where food used to get stuck. I always had algae growing there even if I cleaned out the food.

Try this. Pick an offending rock, remove the frags. Now either "cook" the rock like when you get new live rock or get another rock from a fellow reefer and put it in the tank with your frags on it. My guess is that the algae will not grow on that new rock.

If this is the case, you have a few choices. New Rock, Cook the existing rock, or follow some of the other suggestions here to get something to eat the algae, then keep your water spotless until the nutrients have all leached out of the rock.

I would bet $ that you will fix the problem if you try this.

Originally Posted by michika

Quagmire,

Can anyone think where I'm getting nutrients in my system? I don't really feed that much, and lately when I do its just a tiny pinch of cyclopses, new life spectrum pellets, and formula one (maybe two) pellets. All of my RO/DI cartriges and resin are good, still almost brand new. None of the equipment I use has ever been used for anything else other then tank related things. I run two three reactors, Calcium, Kalkwasser, and Phosban (with phos-lock).