Observation

[StirCrazy]

Originally Posted by reef_raf

I've noticed that since removing all that rock and the sand underneath it, My skimmer isn't pulling any gunk from the tank. I'm guessing this implies the rock and sand were contributing a lot in the way of dissolved organics.

Any opinions?

I am leaning to wards the sand contributing to the problem more than the rock. My reason for saying this is that when I moved from my old house to the new one I was emptying my skimmer overflow every day, after removing 85% of the sand and adding a bit of rock I am now emptying it every week or so.

I think because of the sand catching the crud under the rocks as we cannot get enuf flow under the rocks because of the sand to remove the crap. this is allowing it to rot instead of being removed by the skimmer which increases the dissolved organics and phosphate in the tank water.

Steve