Assuming that cheato is driving the nutrient levels down to undetectable levels wouldn’t that theoretically created pale sps corals without feeding sps with amino acids or coral foods? In my experience if my nitrates are not above 2 ppm I get very pale looking corals. Due to my cheato being too efficient at removing the nutrients in my tank I’ve had to dose nitrates to detectable levels to keep my sps happy along with amino acids. Can someone explain why Triton doesn’t test for nitrates??