Really Bannacis? I don't have to PH water for the entire 2 wks? can you be so kind to explain why? Thanks in advance!
The reason you shouldn't have to adjust ph is since you are flushing out any build up nutrients and adding plain water, your water doesn't have to be ph'ed for nutrient uptake. so fresh clean water is all you need. that is mainly for soil. you want all nutrients out of soil so no uptake is happening.
But on the other hand (argument) is that with hydro, since there is no medium per say (clay pebbles) and the only nutrients are in the plant itself, some say you need to ph the water so the roots can transfer the nutrients out of the plant. I myself think that you only need to have the ph ranged for nutrient uptake not for release...I don't think nutrients leave out the roots.
the plant will use any nutrients it needs that are left in the plant, that's why you get yellowing.
What you want is for your plants that flower (kinda like a fruit) to ripen up, you will have leaves start to turn yellow, usually the big suckers first. that's the plant drawing nutrients that are still in the leaves (so those leaves will yellow and die) that is a good thing....only in the final stages of flowering!!! also with hydro...some say you don't have to flush for 2 weeks before harvest because of no medium to hold nutrients.some say only a week...but I think 2 weeks allows the plant enough time to use up as much as any extra nutes in its system.
As for your early yellowing and leaf width shrinking... What are your temps and humidity. try to get a temp reading at top of plants. are all plants doing this? the shrinkage of leaf is it like curling under?
I seen in the big close up some leaf tip burn and curl, that can be caused by over nutrients or a lock out. and heat maybe?
How often do you change your water in your reservoir during the flowering period? and your water temps?
how many gallons is tank? prolly should change water every 2 weeks and before you run it to your plants, if its cold, let it warm up or you could shock your plants.
you want you your water temps about 70-75 degrees, to high and root rot can set in.
You can go to Google.com and ask a question and you can get some decent answers. don't make the question to wordy, sometimes just putting in subjects like " hydro water temps" it will auto fill in different suggestions.
Read different articles and find common answers. but take caution not all is correct, so be selective.
Or like the forum here...there's a bunch of good knowledgeable peeps. or message me directly and I will be more than happy to do my best to find an answer for you.
I'm a Soil/soilless grower, cause its more forgiving, less prone for mistakes. I grow organically... better overall quality buds. but not as automatic (watering) and usually hydro you have faster growth and sometimes a shorter flowering period (about a week) sometimes!!!
hope this helps some...sorry for such long rant...lol :woot: