I have been struggling for the past 2 years with hair algae.
Due to much advice from this forum I have decided to convert my sump to a refugium. I found a link to a site which described a procedure on how to make live sand from sterile sand, but unfortunately I can't find the link anymore. At any rate I have followed their procedure and I have put a bag of my Old Castle Sand into a large cooler and added 10 gallons of my salt water mix. I added a small amount of my ground up flake fish food along with a few cups of water from my aquarium. The water turned a lot muddier looking than I expected. Furthermore, a dark ring of dirt has formed around the water line. Does anyone know if this is what I should have expected? Is all Old Castle sand Aragonite sand? It was marked play sand, but it didn't say that it was aragonite anywhere on the package. I have read on many posts on this forum that one shouldn't wash the sand because you don't want to remove any of the small particles, but I am going to have to decant this at some point.
Any advice on how to proceed would be most appreciated.