Just out of curiosity, what are the ammonia and nitrIte readings in the tank? How about KH and pH? I think that most folks on this list have had very high K with no harm to the fish. I think you might have misunderstood the person who responded to you about taking out the bio-balls (I think it was Tom Barr). The bio-balls are there to provide surface area for the bacteria which convert ammonia (NH3) to nitrite (NO2), and nitrite to nitrate (NO3). In a planted tank, the bioballs are less necessary, since the plants will use the ammonia directly. If the plants did not, taking the bioballs out would increase the amount of ammonia and nitrIte in the tank and decrease the amount of nitrAte, since nitrAte is the end product of the nitrogen cycle. (This assumes the nitrifying bacteria live only in the bioballs, which is not true - they are on every surface in the tank). Seachem makes Flourish Nitrogen, which will increase your nitrogen with no potassium. I forgot if you said in your original post - how long has the tank been up and running? ----- Original Message ----- From: Nickeydundee@aol.com<mailto:Nickeydundee@aol.com> To: aga-member@thekrib.com<mailto:aga-member@thekrib.com> Sent: Wednesday, January 12, 2005 2:24 PM Subject: [AGA-Member] To much K Dear SH, The reason I think it is K is because the other chemicals are all in check like the nitrate 2-5 ppm. So, the K is the one that sticks out the most I use the aquarium landscape kit from Fish-vet.com... The other thing that could of caused it is the nitrate but is was added slowly into the tank unless a 2ppm to a 5ppm increase during 5 days was to much? But, to get is to jump up I guess the K level went to high. Hey while I am writing has anyone taken the Bio-balls out of there water-drys to let the nitrate build that way to?? AZ _______________________________________________ AGA-Member mailing list AGA-Member@thekrib.com<mailto:AGA-Member@thekrib.com> http://lists.thekrib.com/mailman/listinfo/aga-member<http://lists.thekribcom/mailman/listinfo/aga-member> _______________________________________________ AGA-Member mailing list AGA-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/aga-member