razingthebar
Member
For anyone tracking this, my gains have been short-lived. I am able to stabilize the pH for up to 36 hours after adding Great White and hydroguard (hydroguard alone appears to do nothing - maybe it keeps things from getting worse).
Do people who use GW add it when they top-up? I've been changing the res with fresh nutes about twice a week and then topping-up with fresh water only to fight nute lock because the two strains growing in the same res have significantly different appetites. If I'm adding GW once a day, that seems like it would gunk up the system more than anything...
Here's a pic of the roots from a day or so ago.
I did get my H202 in the mail, but I'm on the fence about using it. I'm at the start of week 6 (Day 36) of Flower, and the buds are looking pretty decent, pistils on most are starting to darken and curl, trichomes are still clear - I'm hesitant to do something drastic this close to harvest.
I thought for a minute I might not be letting the chloramines evaporate (not letting my water sit long enough - I let it set about 18 hours). However, I tried letting it set for 24+ hours one time and had the same result as letting it set for about 6 hours. My thought was the chloramines were killing the hydroguard and GW (but for some reason not the pythium)...
So now I'm back to adding about 1.5ml pH Up twice a day to keep the pH in a normal range - otherwise it drops into the 4s. My next grow I may try a sterile res, but I"m hesitant to start using it this late into the grow...assuming you would use H202, I"m interested to hear thoughts about starting using it with only 2-3 weeks left. I think I can get there without it...
At this point my best guess on the pH issues: room temps in the mid-80s (750W equivalent LED in 4x4 grow tent); res temps in high 70s to low 80s. That's causing a bit of root rot, which is messing with the pH. Also, having two strains in the same res with very different appetites means if I'm feeding X correctly, I'm burning Y; if I'm feeding Y correctly, the nutes are leeching out of X and making the pH drop. I currently try to straddle so the EC rises slightly while burning the one strand only slightly. Also, having this all occur in such a small reservoir makes it prone to more drastic pH swings.
Do people who use GW add it when they top-up? I've been changing the res with fresh nutes about twice a week and then topping-up with fresh water only to fight nute lock because the two strains growing in the same res have significantly different appetites. If I'm adding GW once a day, that seems like it would gunk up the system more than anything...
Here's a pic of the roots from a day or so ago.
I did get my H202 in the mail, but I'm on the fence about using it. I'm at the start of week 6 (Day 36) of Flower, and the buds are looking pretty decent, pistils on most are starting to darken and curl, trichomes are still clear - I'm hesitant to do something drastic this close to harvest.
I thought for a minute I might not be letting the chloramines evaporate (not letting my water sit long enough - I let it set about 18 hours). However, I tried letting it set for 24+ hours one time and had the same result as letting it set for about 6 hours. My thought was the chloramines were killing the hydroguard and GW (but for some reason not the pythium)...
So now I'm back to adding about 1.5ml pH Up twice a day to keep the pH in a normal range - otherwise it drops into the 4s. My next grow I may try a sterile res, but I"m hesitant to start using it this late into the grow...assuming you would use H202, I"m interested to hear thoughts about starting using it with only 2-3 weeks left. I think I can get there without it...
At this point my best guess on the pH issues: room temps in the mid-80s (750W equivalent LED in 4x4 grow tent); res temps in high 70s to low 80s. That's causing a bit of root rot, which is messing with the pH. Also, having two strains in the same res with very different appetites means if I'm feeding X correctly, I'm burning Y; if I'm feeding Y correctly, the nutes are leeching out of X and making the pH drop. I currently try to straddle so the EC rises slightly while burning the one strand only slightly. Also, having this all occur in such a small reservoir makes it prone to more drastic pH swings.
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