If you are getting nuisance algae, get to the source of the problem instead of trying to cover it up with a "clean up crew." Yes, the cleanup crew will help with algae issues, however, they will not be a cure to the problem.
Excess nutrients in the water column encourage unwanted algae growth. If your tank is still cycling, I wouldn't do a thing (besides turn off the lights) because algal blooms are normal during the cycle. They will eventually burn themselves out.
However, if your tank is finished the cycle, I would test for phosphates. Chances are the phosphates are high (because of a lot of die-off from the rock). You can decrease the phosphates by doing water changes with RO
water and using RO
water for top off. You may also want to consider using a phospate adsorbing product such as RowaPhos.
Eventually (given proper conditions), coralline algae will begin to develop. With time, it should cover almost everything in the tank. Just be sure to maintain proper calcium and alkalinity levels because coralline is a calcerous algae and lays down calcium carbonate to grow. Also, keep phosphates low as phosphates will inhibit the growth of coralline (as well as corals). Good luck!