I didn’t do anything, kept along with routine maintenance. While all this was going on and leading up to it I had turned all my pumps up considerably to oxygenate the water best I could. I turned up my return pump to agitate the surface more, skimmer running at max flow, my mp40’s I turned up a bit as well. Waited it out and about 30hrs later it was gone, my tank hadn’t been that clear in months. Immediately after i started dosing phos and nitrates and no issues since, that was over a month agoThat’s what I’m thinking a 24w is like £60 but there renowed for only working for a few months. But I did find that oase 11w ones are £74 and I can plump it in to the return pump feed in may aio back into the tank but it looks messy. But it’s a temp solution!!.. how did you get on with ammonia as the bacteria died ?
A recent addition of a Mandarin Dragonet may have contributed to the growth of more gha, as I overfed my system with what I normally feed and that is on me....lol