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Originally Posted by CMG  Do these guys eat all types of algae or just coraline? If they eat all kinds you could just use tap water with a buffer for chlorine and all those phosphates would grow algae like mad. yum yum yum. |
Yes they're excellent herbivores and will eat not only coralline but macro/micro algae. The problem with tap water is that in many municipalities PO4 is the least of your concern and since Inverts can be very sensitive to water quality this generally isn't a good idea.
My suggestion would be to simply supplement their diet with nori or other algaes sold at your LFS..