Carbon will not remove potassium (K) - the only way to do that is with water changes. Terry ----- Original Message ----- From: <Nickeydundee@aol.com> To: <aga-member@thekrib.com> Sent: Tuesday, January 11, 2005 9:47 PM Subject: [AGA-Member] To much K in the water > Hello ALL, > Thank you for responding to some of my questions about RO water. A > new problem has just happened to me and it is dealing with adding KNO3 to my > tank. I am trying to get a better N reading and have been adding KNO3 powder > and guess I over did it somewhat. I was adding it to the tank for about three > or four days now a little bit at a time and then testing daily to get the > nitrate level and it was reading a zero so add some more right. But, today > noticed some ick or maybe some lymph outbreak on my discus so tested the K levels > of the water and the were above three ppm or higher. From my readings I > thought that high levels would be ok and not have a negative impact on fish but I > know now that it does. My one discus is up at the top hurting because of the > high levels of K so put a lot of carbon into the tank to pull the K out of > the water hopefully it will be ok and the discus will make it. So, I have > learned first hand not to have to high of a K level in a tank with fish in it. > But, begs the question, what else can I use to bring up the nitrate level??? > _______________________________________________ > AGA-Member mailing list > AGA-Member@thekrib.com > http://lists.thekrib.com/mailman/listinfo/aga-member > _______________________________________________ AGA-Member mailing list AGA-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/aga-member