Tried an experiment yesterday...since the plants can benifit extra Co2 on a 24/0 schedule, I tried this:

Turned off the exhaust, and lit up one of those 10" incense on a stick inside the wardrobe (planted it in the soil of Stubby, which has the most free space) and let it combust for 30 minutes.

Agreed, it released equal parts of CO as well as CO2...and the temperature shot up nearly 10 degrees, and the humidity went up about 2%, but... (and maybe it's just my imagination)

The leaves on all plants seem to have grown this tiny bit fatter, Jr definitely is growing new leaves (then again a 24/0 light schedule will do that too, and I did feed the plants a few days back).

As well, the added vermiculite & perlite is doing a fine job in preserving moisture in the pots; I haven't had to water the plants since I fed them!:thumbsup: