So I noticed today the tent wasn't bowing in as much as usual and was 88 degrees with close to 60 rh, so I checked the exhaust and it was barely pulling anything out. So I took the carbon filter off and the fan was working fine. The pre filter on the carbon filter was caked, and I mean CAKED, with white dust that looks like powdered sugar. I started to panic and thought I had a WPM issue on my hands, which made no sense to me because my RH is usually steady around 40%. No white powder on the plants, but There are signs all over the tent. Its been there but I just wrote it off as dusty.
The ropes from the hangers
The lights
The fan
And one of the straps (an old belt) that hangs the filter
I don't think this is WPM though. Since its so dry here I've been using a humidifier during lights on to keep the RH around 40 and also keeps the temps from getting higher than 82. I've just been filling it with tap water and our tap water is no bueno, so I'm thinking this is a mineral/salt buildup from my schitty water.
The loss in pressure in the tent has only happened noticeably today. I washed out and dried the pre filter and vacuumed around the carbon filter to get as much of that white dust out that I could. Seems to be flowing good again.
I also ordered a RO filter for the kitchen and will be using RO water starting Sunday for both the humidifier and for watering the girls.
Now for the girls. Lefty looks fine, her flowers are starting to show and all looks good. No yellowing or dying leaves.
Lefty
Lefty undershot
Righteous however has had a few yellowing lower fan leaves over the last week and more today. I plucked 6 off her just tonight and probably 15-18 over the last week. Also a lot of her leaves are starting to cup and droop. She still has been growing well, but there's obviously a problem.
Righteous
Yellowing
The only thing I can think of is that she has been the closer one to the humidifier the majority of the grow and has absorbed a lot more of those salts and minerals from my horrible tap water. The inside of my humidifier is caked with crap too so I'm almost sure this is the culprit.
They were both fed this last watering and are both due for just straight water tomorrow. My thoughts right now are to just flush with a couple gallons of straight 6.5 ph water and see how she recovers. Grab a couple gallons of distilled from the grocer for the humidifier til my RO system is up.
Let me know what you guys think. Any thoughts or suggestions are greatly appreciated!