Iirc, the ffish-vet kit measures very low values of K and you can 20 ppm or much and not have any problems at all. I've seen tanks goes for years at that kind of K level without any problems for the K for fish or plants. AS for your nitrate, your plants could be sucking it up as fast as you're putting it in or the test kit solution has gone off. I don't remember if nitrate kits go bad with age -- I think it depends on the type. I used to dose potassium sulfate once a week, not every few days. The only thing that seemed to react to this was the conductivity meter, which is to be expected. I know this isn't much help, and I admit I don't know what's going on in your tank, but I don't see a reason to suspect K yet. Scott H. --- Nickeydundee@aol.com wrote: > 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?? > ===== Christel Kasselmann, author of the best current authoritative text on aquatic plants will be a featured speaker at The Northeast Council of Aquarium Societies 30th Annual Convention. March 18-20, 2005 at the Marriott Hotel, Farmington, CT _______________________________________________ AGA-Member mailing list AGA-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/aga-member