Been fighting GHA on submerged portion for about 2-3 weeks now. Did a massive trim and still kept coming back. Pulled all the moss from the submerged area and moved it to emersed and still nothing. Decided to test my phosphates just for the hell of it and it's quite high so going to try a round of phosguard to try and get it back down to 0 or almost 0. Also realized I've been dosing way too much as I have been using the UNS all-in-one but in conjunction with a heavy nutrient rich soil I'm just pouring way too much ferts. So going to switch to the ADA method of no nitrate or phosphate dosing whatsoever and just Brightly K, Iron, and Multi-trace.