cookie
cat
My tank is over six month old (75 gallons) and my sand turns brown and will not stay white. I am using RODI and everyday when I top off, there is more brown algae on my sand after each top off. I have only been using RODI for a week. Do I maybe have too much sand or is this a normal part in the cycle. I have a beautiful tank with great water quality and salinity but have this terrible brown algae on my sand and I want to get rid of it!! Any suggestions?