Once made a DYI anenome catcher out of a sponge and pvc pipe (read about the technique in a magazine for getting them to come off the rock without damaging the foot) Gave the sponge a quick rinse and placed the device in the tank. Something in the sponge made my protein skimmer go bezerk and foam overflowed the skimmer and the sump. Ran that way for days!!!! Wound up placing a drain from the skimmer cup into 5 gallon jug to collect overflow. Also, the device never worked as the anenome just went to the other side of the rock