Hi Rusty, thanks for the response.
I am using the liquid test kit, when i tested the run-off water i filtered it through kitchen towel first, the water looked clear before i tested it, but i do realise they are not the most accurate way to go.
They've been in 1 gallon pot for 5 weeks, too small and too long in one place i know, but the plants are quite short and i was hoping to finish them in these, though i know i'll have to repot them if i want to keep them really happy. The thing is i've got 6 clones nearly ready to flower and if i go for bigger pots i'm gonna struggle to get them all in my space, so i'm kind of torn about what to do, also i can't get anymore FFOF for a few days.
I haven't used any other additives, just my nute regime, which i've been following rather strictly.
I tested my water run-off again last night and it was just as low as before.
What would happen if i didn't do anything ? would it seriously harm my plants ? would it affect my yield ?
Thank you very much indeed for your help.:thumbsup:
P.S my plants are white widow, so i've got at least 5 more weeks to party time.