So, i flushed each plant individually with approximately 1L of pH balanced water earlier today. Since i was out the rest of the day, i set my res timer for my ebb & flow table to run once in the afternoon (figured i should kept the babies well watered, but did not add feeding solution).

Upon returning I noticed that my once drooping leaves were now angled upwards towards the lights (definitely a good sign of returning vigour, right?) and so rebalanced my res pH to 6, adding my feeding solution at 75% (didn't want to shock them bring it back full strength right away). I will closely monitor their progress over the next few days and flush again as necessary.

This is probably a noob question, but how often should i flush my plants? Do i do this on a regular basis (ie. with every change of my res water = once a week) or should I only be concerned with doing it when noticing major plant problems and before harvesting my bud?

In an added note... my run-off is running a pH of 7.5, which seems way too alkaline to me. I can't say i've measured it in the past so i have nothing to compare too. I know that rockwool has a tendency to make water more basic as opposed to acidic, and considering my run-off drains back to my res i know i may very likely run into the same problems i've just had.

Now to the question: Should i risk running my res water a little higher on the acidic side (5.5 or more acidic) in the hopes that my run-off will balance somewhere in the range i want it to be (5.8-6 pH) ?

OR

Am i just detecting the remnants of the Neutral pH solution i flushed with earlier today?

I've been getting conflicting info from different threads i've read, so a little reassurance is greatly appreciated as i get ready to prep for cloning at the end of this week. Thanks again for all your help!
steeltownstoner Reviewed by steeltownstoner on . HELP... Yellow Leaf Edges! Potassium deficiency? So i noticed the first signs of DRAMATIC leaf colour change yesterday on two of my Mystery Seed/Juicy G plants. My inital reaction was that the 42w CFL bulbs i am using are too close to the plants and burning the leaves, but this discolouration effect only happened on 2 of my 8 plants and of those two only one or two lower leaves were affected. To compensate i raised the lights another 4" from the plants, but when i returned today the yellowing edges have carried to another set of lower Rating: 5