Diadema, Mithraculus and Pitho spp. crabs, Ercolania seaslug. I'm sure you know that when the bubble burst it releases thousands of new baby bubbles. I haven't used anything from the list above which also includes surgeonfish and rabbitfish. Myself I battle for awhile then after more nutrient control they stopped producing. I also stopped caring because everyone who knows nothing about reefing would say "whoa that's neat it looks like a shiny marble" Ya looks cool ay, that's Valonia difficult to grow, wana buy some?
