Flushing with RO or rainwater

[FastForward]

Can you overflush with RO? I'm planning on a 2 week flush with the filtered rainwater I'm using and already after 1 week they are really sucking the N out of the leaves and starting to look like hell.....(turning colours)

Can I leave it another 2 weeks, or should I give them a regular dirty tapwater feed to give them something?

 

[koopa troopa]

if i were you i would use rainwater over pure RO. your leaves are probably yellowing because they are lacking calmag. if you don't got any calmag laying around, try blackstrap molasses since it has calmag in it. maybe mix a small quantity of tap with your RO too. this was a trick done by buck from annaC seeds, but then again, it is all how you feel it out.

 

[Zoolander]

I flush for 1 week with the molasses and the last week with straight RO most of the time

 

[FastForward]

Thanks...will get some molasses asap...been meaning to for ages.