I would say that the best way to lower nitrates in your tank is to do a water change - at least 25%. I keep planted tanks, which actually take up nitrate, and I have to add it. I try to keep it at about 5ppm, but some keep it up to 10ppm. HTH. ===== J. Miller Edmonton, AB, Can. Trade aquatic plants on The Plant Trading Board http://www.aimoo.com/forum/freeboard.cfm?id=312188 __________________________________________________ Do You Yahoo!? Get personalized email addresses from Yahoo! Mail http://personal.mail.yahoo.com/ ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com.