Whats going on everyone? Im wondering if the API master test kit ever expires because I tested my nitrates on my 46g and there only 10! Which is great but Im not use to those low numbers lol. I changed the water a week ago to. I have a 5in firemouth, 3in spotted raphael and 4 S.A. cichlids whose lengths are 2in. And i feed them every day. morning and night. Thanks