I have now repotted them in nice new pots with Mircale Gro pot mix, mixed with about %25 - %30 perlite, I also bought some new feed which is 24-8-16 I wont be using it though as the pot mix already has nutes in for round 3 months (So the packet says), the shop did not have a PH tester, but I am going to order an electronic one from ebay later, although from past experience the tap water and rain water are ok, but maybe the nute I was adding was throwing it, to me it looks like a nute lockout as a stripe in the middle of the fan leaf and spots appear then the leaf dies.

I hope I have caught this in time, if not ill be starting from scratch ill keep posting let you know what happens.

Thanks very much for help.

-Nimrex