Hi Albert, I have a question regarding my 29 bio cube. I am using the middle compartment for a refugium. I have rubble rock and spagetti maco in it, but hair algae has taken it over. I remove it manually but am losing the spagetti in the process. I have no hair algae in the main part of the tank and my LFS said I will get the same result with the hair algae as I do with the spagetti algae. They both remove nitrates. I have been thinking of taking this out and using this space for a media basket with purigen and chemipure elite. I have no skimmer on the tank, I do 4gal water changes weekly. All my paramiters are good. Everything is doing great, so should I just leave it alone? I have to get your nano book!!! When I first go into saltwater 15 years ago I went by your advise in your earlier books. I bet when I get this book I won't have as many questions. Thanks for your help.