Ok, have stopped using the food previously mentioned and have continued with the phosphate nuker and the gfo
in my reactor and phosphates are still very very very high.
I just did another 100g water change yesterday and levels are still extremely high.
I checked the water before adding it to the tank and it showed no phosphates at all so whatever it is, is coming from my tank and leaching into the water.
It's my understanding that this leaching process can take months so I am assuming I will be battling this for some time.