I’m an intermediate reefer and I have my main display which is a 100 gallon tank sps dominant mixed reef and that tank blooms with healthy corals and full of fish and I have been successful in controlling nutrients and chemistry. Anyways I have a 13.5 gallon tank (fluval evo) I’ve been running for a year now and I’ve never tested it. I’ve always seen corals and fish doing great but I got curious and tested the nutrients, nitrates are 1.3 and my phosphates are .42. I have a refugium in the main chamber and a phosphate removing pad in the middle with carbon pad and ceramic balls for bacteria. I’ve tried a bag of GFO but had the same issue where water just doesn’t flow through it strong enough. Does anyone have a better suggestion? I have red coco worms, a clam, a crap ton of corals (lps dominant) and a large cleanup crew which includes spaghetti worms and feather dusters that have taken over some rocks. Thanks everyone.