since i started this thread, thought i ask here this. When i bought this calcium reactor (octopus cr220) i was told that since some of the co2 will be going into the tank it will also feed algae, causing algae blooms. the guy advised me to put return tube by protein skimmer inlet so it could be aerated a little. I have no experience with calcium reactors yet, is that sound like a good solution? is there a better solution to prevent possible algae grows?