ok cool thanks for all your help on the plants, I'll have a look this weekend for some of that fungi killer shit in my price range if not i'll just wait and see.

Also, my good plant. Are there any problems with that? I have noticed the leaf tips are curling downwards is this ok?

There is also obvious nute burn on my good plant, will this eventually stop or should I keep flushing?

Also, in future how would I prevent root rot from happening? I have flushed out the 2 plants about 6 times in 3 days, Did this contribute to root rot?

Thanks again