Knott Collective
Well-Known Member
At my wits end on this one. Need some help please.
The hardware:
The Software:
PPMs (on the 700 scale) when using this schedule are very high, but I've run other strains (Sour Diesel, Casey Jones, Purple Kush, Purple Erkle) that loved it, even with the higher PPMs. The veg PPM's start around 800-900 in first week of veg, increasing to 1400-1800 in last week of veg. Then flower gets even higher.
I've tried reducing PPMs by adding water to dilute but see no improvement. Raising PPMs seems to work though, got some green back and the plants didn't droop as much, with the leaves stretch up toward the lights. But the PPM's are crazy high in the 2200-2400 range. But the girls seem to like it better than going the other way. I'm wondering if they're just monster feeders and need even more because the symptoms look like a nutrient deficiency. Could it be a nutrient lockout? If so how can I tell the difference between a lockout and burning them up with too much nutrients. I see no classic signs of too much nutrient (burnt tips and edges).
The problem:
Some older fan leaves are getting rust spots and discolorations beginning in the middle to the end of the leaf, then crinkling up and dying off. New growth comes out swinging and looks great, then as it ages the problems set in. Seems to affect the middle to the top of the plant more than the bottom. On last run I tried flushing but couldn't really tell if the flushing helped as I was battling the dreaded "brown slime". I used compost tea to good effect with the slime. I also hit it with Physan 20 (not at the same time as the beneficial microbes though). I also kept the EC fairly low at 1.2 - 1.5. But I battled the leaf problem all the way through the run and got a smaller yield that did not live up to the strain's potential.
I've run this strain about 6 times now and the first few runs were spectacular, then the damn slime arrived and it's been hell since. I've even wondered if I induced some type of plant disease that might have came alone with the slime.
So I got the new, better system that doesn't leave standing water in the buckets between feedings, sterilized the heck outta the room, and added the chiller and Dutch Master Zone to this run. I replaced or sterilized every component that ever touched the older system, new pumps, lines, air stones, everything. Didn't want to retain that damn slime. So far res is squeaky clean, bright white roots, and no slime.
And some pictures, taken under the metal halide lights, with don't distort the color as much as the HPS. Later tonight when the lights go off I'll take some more pics and add them. In the meantime, here are the girls in need of your help:
Thanks! in advance for your time and assistance, it is greatly appreciated.
Knott Collective
The hardware:
- Sealed 12' x 12' room, tile floor with drains, clean and tidy, no contaminants
- 1000w metal halides (veg), HPS (flower) in Sunlight Supply's "Magnum" hoods, 8" air cooled, 1450 cfm exhaust scrubbed with carbon can-type inline filter
- Room air moved by 1450 CFM exhaust through largest Can-Filter (CF-150)
- Newer style Ebb-N-Flow system, 24 pots, 55 gal reservoir (filled to 40 gal)
- Eco-Logic 3/4 hp chiller (67-68f res temps), two air stones running daylight only
- Connected to house gas system CO2 generator with Sentinel controller, PPMs set at 1250-1300, daylight only
- Dedicated Friedrich 24200 BTU mini-split keeps room at 74-76 day and 66-68 nights
- Frigidaire dehumidifier set to 60% max to prevent mold
- Plumbed in Merlin R/O water system, starting PPMs 10-50
- A few Portable fans moving air in room
The Software:
- Strain is Woody Kush (mixture of Hindu Kush, Master Kush and OG Kush)
- Hydroton medium. Clones started in 1" then put in 3" blocks, then into hydroton above the waterline to avoid soaking rockwool
- Feeding every 2.5 hours, starting one hour after lights on, total of 6 feeding per day in veg
- Now in third week of veg
- Using nutrient schedule below, added H&G Nitrogen Boost and Dutch Master Zone
PPMs (on the 700 scale) when using this schedule are very high, but I've run other strains (Sour Diesel, Casey Jones, Purple Kush, Purple Erkle) that loved it, even with the higher PPMs. The veg PPM's start around 800-900 in first week of veg, increasing to 1400-1800 in last week of veg. Then flower gets even higher.
I've tried reducing PPMs by adding water to dilute but see no improvement. Raising PPMs seems to work though, got some green back and the plants didn't droop as much, with the leaves stretch up toward the lights. But the PPM's are crazy high in the 2200-2400 range. But the girls seem to like it better than going the other way. I'm wondering if they're just monster feeders and need even more because the symptoms look like a nutrient deficiency. Could it be a nutrient lockout? If so how can I tell the difference between a lockout and burning them up with too much nutrients. I see no classic signs of too much nutrient (burnt tips and edges).
The problem:
Some older fan leaves are getting rust spots and discolorations beginning in the middle to the end of the leaf, then crinkling up and dying off. New growth comes out swinging and looks great, then as it ages the problems set in. Seems to affect the middle to the top of the plant more than the bottom. On last run I tried flushing but couldn't really tell if the flushing helped as I was battling the dreaded "brown slime". I used compost tea to good effect with the slime. I also hit it with Physan 20 (not at the same time as the beneficial microbes though). I also kept the EC fairly low at 1.2 - 1.5. But I battled the leaf problem all the way through the run and got a smaller yield that did not live up to the strain's potential.
I've run this strain about 6 times now and the first few runs were spectacular, then the damn slime arrived and it's been hell since. I've even wondered if I induced some type of plant disease that might have came alone with the slime.
So I got the new, better system that doesn't leave standing water in the buckets between feedings, sterilized the heck outta the room, and added the chiller and Dutch Master Zone to this run. I replaced or sterilized every component that ever touched the older system, new pumps, lines, air stones, everything. Didn't want to retain that damn slime. So far res is squeaky clean, bright white roots, and no slime.
And some pictures, taken under the metal halide lights, with don't distort the color as much as the HPS. Later tonight when the lights go off I'll take some more pics and add them. In the meantime, here are the girls in need of your help:
Thanks! in advance for your time and assistance, it is greatly appreciated.
Knott Collective
