Hey guys, so I am having trouble with my alkalinity. Its a 20 gallon tank with just a little bit of coral. Two 2" frags of birds nest, a 1.5" frag of favia, hammer, duncan whisker, and a bunch of small zoa colonies. I tested it today and it was ~6.1 dKh (pH ~8.1, Calcium near 500). I use Salifert's alkalinity test and API for calcium & pH. I don't dose much at all, but after checking, I dosed with Aquavitro 8.4 and brought up the alk to 6.7. I do 10-20% water changes every 1-2 weeks using Aquavitro Salinity. The alkalinity on the newly mixed water is 10 to 12 dKh and pH of 8.4 to 8.6.
My tank has been consistently low on alkalinity and I can't seem to figure out why. :doh: Any suggestions?
My tank has been consistently low on alkalinity and I can't seem to figure out why. :doh: Any suggestions?