Sorry for delay in replying guys, i have read the replies and done as directed, thanks for your help.
I flushed 40 liters through each pot followed by 3 liters of feed at 1.0ec 5.8ph. My calmag has just turnt up so ill be giving them a good soaking later today at 2ml per liter for 2 days as instructed by Bulls. Ive also upgraded my intake from passive to a a1 150mm rvk pulling through an old 150mm x 600mm rhino filter. The burn has continu3d slightly in the 2 days after flush but has slowed/stopped i think now. Ill be removing some growth today. Also ill be flipping tonight/tomorrow.













