Massive thanks for the replies.
The reason I use rain water is because last year I ran an outdoor grow using some cheap seedstockers auto strains
I threw some Jack's magic soil along with some perlite into 7 litre pots and after 90 days I had the best cannabis I'd ever smoked. I had accumulated 394 grams off of 8 plants. I had no issues. I collected the rain water from a paddling pool. Most of the time i had to water them as last year's summer was a scorcher. As for nutrition I used that formulex stuff.
In this grow I'm running the same strains same Jack's magic and perlite. Same nutrients... The only difference is I'm using leds.
A soil slurry test will be done shortly.
Here are some pictures. It's day 36
Because I'm in a slight panic and I can't hang around waiting for you busy people to reply I have to use my intuition and do what I think is the best approach while I wait for the help.
What I've decided to do also is foliar feed them as I believe that yellowing is because the plant needs feed and isn't getting it at the roots because of a lockout. I sound like I know what I'm talking about I know nothing. I can grow good tomatoes and other vegetables. But my attempt indoors at cannabis isn't going to well..
Cheers.
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