Yes I have high nitrates and phosphates. Been doing weekly water changes to help lower my numbers. I have emerald/Astrea/turbo/pithos/hermit crabs and a TEMPORARY tang. Nothing seems to be helping the problem. I’ve been manually removing it but at this point I’m just letting it grow to try and eat up some of the nutrients. What are some other suggestions for eliminating gha? Let me know if you have any specific questions about the tank. Thanks!