Arreola I've had my 2 turbos for about 15 months and they're still doing fine and getting huge. I also have about 10 nassarius snails that are good for digging in and helping clean the substrate - don't see them pop out of the substrate till feeding time or during the night. I also recently added one fighting conch - another substrate cleaner that usually stays buried in the substrate, sifting through it. I also have a few hermit crabs, but if I could do it over I wouldn't get any hermits - they are always killing off my small snails for food and their shells. I've had better luck with an emerald crab - they don't attack my small snails, and haven't bothered anything else, but are good for cleanup and picking algae off the rocks. I have a couple Astrea and Trochus snails also - good algae eaters. The Trochus are better IMO as they can turn themselves over if they fall upside down - the Astrea snails often can't do that and end up as crab food. I once had a sand sifting star, but the tank was too new and it was short lived - these stars can starve easily once the eat everything out of the substrate. My banded serpent star does a great job of cleaning up excess food. IMO I'd avoid the spiny brittle stars as this type can catch and eat fish at night. Hope that helps. At the current time I'm guessing I have in my CUC:
2 Turbo snails
10 nassarius snails
3 Astrea snails
2 Trochus snails
1 fighting conch snail
1 serpent star
1 emerald crab
3-4 hermit crabs
brycek Take some pics as you set up and pipe in the refugium please. Are you still waiting for the Lifereef overflow box? EDIT - I guess you didn't get the Lifereef yet - bummer on them dropping the one they made for you. I'm not sure what other ones may fit in the back - probably none unless you want to cut that plastic off the back. If it was me I'd wait for the Lifereef. Could you post a pic of the refugium when you get it?