Hi everyone. OK, my tap water is around 4 degrees KH (71.6 ppm) for both KH and GH. Ok, so I set up my new 55 gal and was going to start silent cycling tomorrow and just took KH and GH measurements and they are unbelievable high--like much bigger than any scale I can find. I have repeated the test until I'm almost out of reagent. This can't be right, correct? Something chemically is interfering with the test. I have CO2, organic eco-complete-type substrate (from aquarium plants.com--their brand), carbon filtration (for now)...what could explain this? This water is one day old! My plants come tomorrow and I'm scared to death.