Flowering: Day 18 (from flip)
Things are happening with the girls, just nothing overly interesting at this point.
Durban Poison is throwing little flowers, Strawberry Lemonade #2 (right) is doing the same. SL1 (left) is starting to. Blue Dream isn't quite there yet. SL1 is also partially shorter than the rest of the canopy, but not by a whole lot.
I took a handful of fans off of BD, DP, and SL2 last night (about a shoe box worth) to try and give their stretch a hiccup. They're all pretty evened out, so maybe that will give SL1 just enough of a hiccup to catch up a bit. It's not a huge difference, but 3" is still 3". In a few places on the very outer edges it might be 4"-5". I also bumped the light intensity up a bit more. I had it at 80% for the stretch, so they wouldn't burn as they get closer. Even as I raise the light, I'd hate to burn them up if they grew extra fast one night/day, and it seems to work. So I raised the the light about 4", and cranked the intensity to 93%. Once the stretch is over next week sometime (guessing, but should be) then I will get the light set at 22" and pop it to 95%.
Why not 100%?
To be flat out honest, this light at even 95% will be more than plenty (850-900) for most of flower. I'll drop the height to about 12" and the intensity to 80% for the last couple of weeks and end up with PPFD in the mid-upper 900's. Although I may go for 16" and more like 88%, depending on how the very edges look by then, even though with a 12" height, the coverage is still edge to edge with a pretty even (within 100ish) PPFD.
Taken from the back. So DP bot left, BD bot right, SL2 top left, SL1 top right. If you look close enough to the second pic, you can see about 15% in the back right corner where part of SL1 is a little lower. Light coverage is good enough that it won't be an issue, and once the stretch is over I'm going to take a good amount of fans to get things opened up.
Now a couple DP shots:
Yes, I forgot to filter the first image.
As you can see, she's already frosting up, and she's still stretching too!
Water params have been tolerable. EC is slightly dropping, pH is slowly rising. Water temps are OK, but not perfect. They're varying over the course of the day from about 70F at lights on, up to 75F (on occasion 77F) later in the daylight cycle.
The "chart" tells me that this is good, and bump the EC a bit. The last feed was at 6g/gal, and I'm skeptical/nervous about increasing it much considering the issue with the change before last. The leaves look pretty good, although in a few places there might be a very slight trend towards a very slightly lighter green. Nothing to really catch my attention much. That being the case, the drop in PPM could be from the top-off res since the mix in there is more like 2g-3g/gal, which could potentially be influencing the EC/PPM to drop slightly. The drop has been maybe 20-30 PPM, which is negligible really.
I may try a bump to 6.1g/gal, but honestly the more I type about it has triggered me to recall that the first couple days they drank the res down a bit before the top-off kicked in (I need to re-adjust the float) and the EC was static. It wasn't until the top-off started keeping up and its water level was dropping that I noticed the EC lowering.
(I'm saying EC, as that's what's on the chart. The Blue Lab is set to PPM [700 scale] just cuz. lol)
Anyway, the bump to 6.1 may not be terrible anyway, if the EC/PPM is steady, that's fine. If they weren't eating the EC would be rising. I may bump the top-off up a hair, but at this time doesn't really seem necessary. Maybe 3g/gal is fine on that. (50% of main mix.)