i do not have a test kit for phosphates. I turned down the lights to 8hrs a day. I have been using pre mixed sw water from my LFS. AS I think about it they are going out of business, maybe they are cutting conrners and not using DO/DI. I also buy my top off water at a water supply store. I know that it is Ro, but not sure about DI. I have had SW tanks over about 7 years and have never had a problem with algae like this. What would you call that type of algae? Hair?
How can I get RODI water without buying a filter? I am trying to avoid a chemical solution, but is there a option