Thank. Transferring is every reefers nightmare. I replaced the sand bed, replaced 80% of the water with nutri sea water and it seemed to work. Clams made it, fish made it, and luckily so did my sps. No algae issues. But I also feed my fish every other day. So not much in the tank as far as nutrients go. I do not run any gfo or even have a doser. Everything is manual. I'm paraniod of malfunctions.