I'd be interested in user's experiences with RO as well. I am looking for a new unit, and would like some references for reputable companies with quality equipment. Tom - ---------- From: Rusty Witek[SMTP:jwitek@stetson.edu] Sent: Monday, April 28, 1997 6:33 AM To: apisto@majordomo.pobox.com Subject: Reverse Osmosis Units This is all pretty theoretical right now, but if I were to get an R/O unit to treat our Ph 7.8/hard Central Florida water, what should I look for in such a unit? I have no idea what any of the abbreviations in the ads mean, and I'm not too sure exactly what makes one kind better than another. Any info/experiences anyone would like to share? (I probably can't spend much more than $175, if that.) (I just bought a male and 3 female A. cacatuoides, which suppposedly were born and raised in local water. Beautiful fish.) Thanks, Rusty