Ok, here is my dilemma. I have a 180 gallon FOWLR with a 75 sump. I have a reef octo skimmer, rated for 250 gallons, 2 stage carbon reactor, and half the sump full of cheato that grows on a reverse light cycle from the tank. Probably 350lbs of LR and a 1" sand bed. In habitants are 8" french, 6" queen, 4" naso, 7" parrotfish, 4 chromis, flame angel, sand sifting goby, 2 clowns, sixline wrasse, royal gramma. I checked nitrates and according to my test they are over 160. I use an API test kit. I have to admit I dont do as normal of water changes as I should, but did one 2 weeks ago. before that I did one a few months ago(I know, I know). Anyway, all my fish looks great, soft corals(all leathers) look fine, GSP are good, and my RBTAs look amazing. Also have some tube nems that dont have a problem. I also have an urchin and sea cucumbers that are perfect. I also have zero algae growth in the tank, no slime, or hair or anything. I used the test kit on new water that I mixed up yesterday, and nitrates came back zero. Then tested my nano tank that has 5 fish in there that I feed regularly, and again zero. But my 180 gets red within 30 seconds of starting the test. So here are my 2 questions..
1. Do you think there is something wrong with the test kit? It seems weird that with nitrates that high, nothing is having a problem.
2. I did a water change last night, of 10%, and am planning to do another water change tomorrow night(48 hours later) of 20%. Is that too fast, or will that cause problems, or should I worry about getting my nitrates back on the scale?
Thanks for any advice.Bill