Gentelemen I would be very intrested to know about your calcium levels and how much kalkwassar you are useing. also if you are using any addatives to promote coraline algea. I had a huge problem with red algea slime, discusting it was everywhere rock,substrate,glass powerheads,I mean everywhere. and at the same time I had a huge out break of green hair algae to boot. I installed a half dozen turbo snails 3 red leg hermits and 2 blue leg hermits and they just would not thouch the stuff. Then I was told to try driping as much kalkwasser as I could and began using a product called coralvital, ripped out as much hair algae as I could using a toothpick with the end flared out. within a mounth all the red and hair algae was gone and now coraline is growing everywhere on the glass,powerhesds,rock,substrate, snails and hermit shells, Now my wife does all the feeding and can sometimes be a very generous woman so now and then I have to clean up by vacumeing the substrate and controlling phosphates but I have not even seen a small amount of red slime or algae. Clayton I stongly disagree with your veiws on additives I learned that you are a marine biologist on another post and would like to discuss this further. if you can find the time. email me at jeric40@hotmail.com