Thanks for the reply, so it's hard tap water and using canna a+b, I've added a small dose of calmag too.
I actually revived them from this same problem once already.
Hi guy's I've been doing little bits for a fair few years now and the past year I've not been able to complete a full grow because of this 1 problem and I cannot work out what's going on.
I'm scratching my head in desperation trying all different things but whatever I do to make improvements my...