7-11-07 Day #22 of Flowering.
Cab Temp: ~80F
RH: 57%
Nutrient Temp: 78F
PPM: 1100-1250
pH: 5.5

The pH went up today to about 6.3 as it usually does in the mornings. We added some pH down and got it back in the range. While the plants were out of the grow tent we decided to install our new centrifugal fan that came today in the mail. I included some pictures of installation to show you all what I was talking about. The fan again is rated at 175CFM and is very very quiet. We were really excited to hear how quiet it is since it will be near a ceiling vent. Apparently the fan only runs at 48dBA which is certainly a lot quieter than our current squirrel cage style fan. After installation however we have mixed feelings. Among our worries was the possibility of the fan being too powerful for our small space and thus sucking the walls of the grow space inward. This was the case when we took the glass out of the light to improve airflow and improve airflow it did - a little too well. Then the notion of bugs and other things getting up into the light without the protective glass so we started to change our minds. At the same time, we also realized that removing the glass actually created more heat in the room since the light was now nothing more than a passive intake through the bottom, and subsequently the light got hotter, which in return made the grow space hotter. Needless to say, we installed the protective glass again - for safety hazards if nothing else. This pretty much puts us back to square one again as far as ventilation. We have had a good few days where it has been overcast which is a nice change-up from the 103F heat we have been having consistently. If anything, we think in the long run having a more powerful fan hooked up to the light will remove even more heat which obviously keeps the overall temps down. If we really feel the need to install both fans then we will, but the weather should be getting gradually cooler and cooler here pretty soon.

As far as plant growth goes, it is good with bud growth being solid and having great color / smell. However, the spider mites seem for the time being very persistent with regards to our biggest plant. If it comes down to it and we really need to eradicate ourselves of these pesky bugs then we will resort to using a hot-shot pest control strip that can be found at the hardware store. We have used this in the past but have refrained for all of this grow due to health hazards associated with them if too close to your living / growing space.