Film algae is a natural part of life in reef keeping. Check your foods and rinse all frozens with
ro water to remove posible nutrients added in, check your parameters (nitrate and
phosphate) and such and correct if necessary. May be important to ask if you are running
macroalgae's in your
sump, if you are and the film continues then you have a competition and possible nutrient problem. The goal of the macro is to outcompete other algaes for nutrients as well as provide a removal of said nutrients. If you arent running
macroalgaes you may consider it.
Also, whats the snail population in the tank? I know some who run no
refugiums and no macro and tackle the algae problems very successfully with snails and other inverts that feed on the stuff. It's all a matter of balance. You may look at adding some snails and checking your parameters as a start.
Be well aware that some tanks, this is unavoidable. Scraping algae is a fact of life! Welcome to reefing....
