Hello, i am new to the hobby and have been having problems with elevated nitrates and phosphates for some time now, and my corals are starting to become affected. i do 6 gallon water changes EVERY week and still have the problem i have a 29g biocube with purigen, chemipure not the elite and aquamaxx bio pellets in a cpr nano tumbler also have lots of rubble in the middle chamber 30lbs lr, and 40lbs ls. two clowns, two damsels, two gobies. several snails hermits and a cleaner shrimp.. lots of softies, lps, and a few sps.. what am i doing wrong? i just did an 18 gallon wc over the past three days and still have the problems! i dont get it i have cleaned everything in the back. someone please help me!!