thanks! first i'll try to answer the easy parts.
the reflector glass is kept about 24" above the closest plant material. this is producing slightly above 1200 umol in the centers as an average.
running the ballast at 1000 watts right now but thinking about stepping them up to the super turbo nuclear setting and resetting height for about 1400 umols.
you know i have one reservoir running both veg and flower sites. i just changed out the solution at 130 days.
i re-filled with an approx 900 ppm or 1.8 ec solution ph'ed initially to 5.8 with 85% phosphoric acid.
the recirculating part first reservoir is running around 920 ppm with a ph of 6.1.
however, random individual plant pump reservoirs in both flower and veg are running about 1030 ppm so something is happening during the trip through the 7 reservoirs to cause an increase in ppm? or perhaps the entire body of solution has not blended completely yet.
we are tracking the solution daily looking for curves and tendencies.
but all plants in both veg and bloom are looking good. vegging plants growing at high speed as in inches per day. flowering plants producing big fat trichome laden buds. all on one solution.
i won't be able to reach a balance of feed concentration and plant/room demands until i get all sites filled but it looks like i'm getting close.
on the subject of feed ratios i'll get back to you later! i've got to go to work now.[/quote
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I've been running jacks+CN at 600ppms (1:.64) since your first PPK thread started. My first PPK run was in 5gallon buckets stacked w 1.5" tail-piece as the wick.. harvests were big, averaging 6-8Zs / plant with 600w. but yield has decreased as my system has been updated over the years.. different strains and tubing adjustments are leading me to believe (and you will tell me if I'm way off base) that the lower PPMs realized in each PPK rez is being caused by larger tubing connecting each piece of the system passing more lower PPM juice thru to each component. it now looks more like this: 600>650>700>850
In the beginning, you (and I) used tire valves, 1/4" hose and allot of goop. That has grown to garden hose sized 'tubing' connecting the system parts.. I used to get PPM readings like this w 1/4" tubing then: 600ppms in volume rez, 700ppms in the control rez, pump rez was 850ish ppms and individual PPK rezs' were in the 1000+PPM arena.. possible that the larger hose passes more 600ppm juice than the 1/4" hose and that larger volume keeps the PPMs more diluted thru out the system.. eg. you are now putting in higher, 900ppms, initially to gain the 1000+ppms in the ppk rez..
hoping you can follow that gibberish but it boils down to this... I'm going back to smaller hose in my smaller system and sticking to 600PPMs initially.
your larger garden hose thru smaller hole, eliminating the tire valve/electrical connections (yeah!) should also work for 3/8" tubing thru a 11/32" hole and should be just as water tight...
maybe? the main reason i'm feeding at this level is that's what it takes to stay up with these lights. if you don't feed the hell out of them they start showing deficiency displays.