Red / Brown Algae Outbreak!

[robert dri]

I could use some help in identifying (AND ELIMINATING) this recent red / brownish algae outbreak. The tank is well established (2 1/2 years) The substrate is crushed coral. I do have 10-12 snails and a dozen or so hermits. Really the only thing that has changed is what I feed my coral. I began using Coral-Vite a month ago. I've always fed ZooPlex with no problem. 72 gal tank. Running a wet / dry sump with skimmer. Water changes= 10 gal every 2 weeks. Nitrates around 15 for the past 2 years. All other parameters are good.
Any advice would be appreciated
Happy New Year
Robert

 

[mikeymutt]

I had the same problem and purchased 2 golden head gobys.They are very good sand sifters..

 

[robert dri]

you didn't have an issue with them jumping out of your tank?

 

[new2salt1]

If everything truly stayed the same and only the coral supplement change, did you discontinue the coral supp and see if the algae growth subsided?