the easiest/fastest way would be to do water changes. Now, it doesn't solve the problem at its root but will give you some time to find why you have high NO2 (look at filter saturation, tank population, overfeeding, dead fish/plant, water mixing, sand OM content, etc...) Yvan Alleau 450 SE Atwood Ave Corvallis, OR 97333 (541) 752-0320 http://southamericancichlids.com PLEASE NOTE: new address and phone number College of Oceanic and Atmospheric Sciences Oregon State University "When you're far from everything, you're getting closer to the essential" -----Original Message----- From: owner-apisto@v2.listbox.com [mailto:owner-apisto@v2.listbox.com]On Behalf Of Lee, Marshel Sent: Monday, October 13, 2003 10:59 PM To: apisto@v2.listbox.com Subject: How to reduce NO2 Does anyone have good methods to low NO2 level quickly in aquarium? Urgently!!! Thanks in advance Marshel ----------------------------------------------------------------------- -- 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. apisto-digest@listbox.com also available. Web archives at http://lists.thekrib.com/apisto Trading at http://blox.dropship.org/mailman/listinfo/apisto_trader ----------------------------------------------------------------------- -- 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. apisto-digest@listbox.com also available. Web archives at http://lists.thekrib.com/apisto Trading at http://blox.dropship.org/mailman/listinfo/apisto_trader