Básed on the fish list, I would think a lot of food goes into this to feed them. Obviously a nutrient issue with gha leading the way to munch upon those excess nutrients. Stepping up your nutrient export game will be the answer to this issue. Vodka dosing is a favorite of mine as you can drink it as well when things go wrong.
be ßure you have an excellent skimmer or else carbon dosing will only exacerbate an already tough situation increasing flow in the tank to suspend and remove excess food and excrement helps as well. Water testing is great but can give you false readings since the gha eats what's you're testing for. Just assume since you have gha you have excess nitrate and phosphate. Remove all the algae you can by hand and do a huge water change to drop nutrients fast. I personally would look into carbon dosing based on your fish load. My final choice of carbon was vinegar as it is far.more forgiving then the others imo. Go slow if you go the carbon dosing route.
Edited by Reefer4Ever - May 23 2017 at 11:47am