Well I appreciate the responses I received about UV sterilizers and protein skimmers. Here is my last question about adapting various reef technologies to the hi-tech plant aqaurium: What about Ozone with an ORP controller? any benefit in a heavily planted tank? *Mike Roberts - mike at microspan_com *North American Internet, Ltd. - http://www.nail.net *Colorado Springs, CO - (719) 635-NAIL *Providing affordable ISDN to the Front Range...