will a small hole(s) in the bottom of the fc be enough for air exchange, or is a fan or manually fanning myself mandatory?
Depends on your setup.
For tubs you can use a pc fan , or mannually fan them.
I don't put holes in tubs.
Baph
Yep, U could take a 7$ pc or hd fan and wire it to an old 12 volt charger of some sort and stick it to some PVC stuffed with polyfill plugged into a timer.
PW
I hear you about holes, Baph. But fanning kind of makes me nervous, too. I'm thinking about using an aquarium air pump with a filter and running it for an hour a day on a timer. They move about 1.3 L/min. Just need 2 holes: inlet for the hose, and outlet hole with a cigarette filter stuck in it.
Aquarium air pumps are pretty weak IMO, I think a cig filter might be too much for them.
PW
hey
i am fairly new but check these out. i been running 3 diff FC and two of them i use a small aquariium pump with just a couple of small holes at the top of the FC about 1/4 inch dia. so far so good. i just leave them run constantly. btw, i have about 2 inches of perlite in each with about 3/4 inch water. then the other chamber i have geolite on the bottom and run a tropic aire humidifier air exchanger and that runs constantly and so far that works for me. good luck
fattrout
(http://i90.photobucket.com/albums/k256/Fancygrl91/shrooms005.jpg)
(http://i90.photobucket.com/albums/k256/Fancygrl91/shrooms007-1.jpg)
Thos ellok great man I am jealous!!!! I am trying hard but they dont look like yours.
If you're going to make holes make 1/4 inch ones like his along the bottom and same size holes on the top with polyfill, if you plan on using perlite as well.
PW
Gorgeous samples fattrout, so which one of your three FC methods work the best for you?