Hello all, I'm about 3 weeks into my initial cycle and I'm starting to see some green algae over most of my live rock and some darker algae on the PVC piping for the wet/dry inlet and outlet. I'm guessing that this is telling me I'm ready for some snails and other algea eaters? My live rock came with a few specimens like a couple of Brittle stars, crabs and 2 snails but I'm sure a 72g is going to need much more. So..... how many cleaner uppers should I get? It's been awesome to discover all the living things in and on my live rock, I seem to see something new each day.