Could the carbon taken out all the acid buffer and caused the pH to quickly jump up? What is the pH in the tank now? Eric -----Original Message----- From: owner-apisto@admin.listbox.com [mailto:owner-apisto@admin.listbox.com]On Behalf Of Brian Ahmer Sent: Thursday, October 11, 2001 9:28 PM To: apisto@listbox.com Subject: What in the heck!? Here's a stumper for you. I have a 75 gallon planted tank. It has potting soil under gravel for a substrate, tons of plants, some cory's, 2 discus, 2 viejita, 4 rams. I have a Magnum 350 hooked to it just to circulate the water (no filter media in it). The water was tap cut with RO. The pH never wanted to drop naturally so I added seachem acid buffer on occasion to keep the pH under 6.5. All the fish have been great since I started the tank 6 months ago. Rams spawned all the time but babies would disappear. OK, enough background... Two days ago, I opened the Magnum 350 and added a canister of rinsed Black Diamond carbon. Today, I came home and all of the fish were dead except 1 ram and 1 cory. What's up with that!? -- Brian Ahmer ahmer.1@osu.edu http://www.angelfire.com/or/biggestbri ------------------------------------------------------------------------- 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. ------------------------------------------------------------------------- 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.