
Automation of co2/o2 exchange
#21
Guest_golly_*
Posted 12 April 2005 - 06:04 AM
I'm quite happy with the results...I dont think its ness to fan out all the air in a chamber when the co2 is primarily just localized to the casing zone..
#22
Posted 12 April 2005 - 06:43 AM
If I mount the fan on top and create a little positive pressure in the tank with it, there should be little chance of anything getting in.
#23
Posted 12 April 2005 - 10:04 AM
#24
Posted 12 April 2005 - 09:39 PM
Here are some pics of my grow chamber. The only difference is I have a second light attached to the bottom of the shelf. I got rid of the perlite on the bottom and I now have six 13x9x2 sized casings in there. I did away with the heating pad under the chamber because of the second light. You can see the little white box on the bottom Left hand side of chamber.
I still have my temp and RH the same. The fan is only running at 9.6v instead of its full 12v. I also use a coffy filter over the little wooden box the fan is in. I attached that to the side of the chamber. Sorry I ahd show my little Maz I had going at that time . I only did two 8x8x1.5 inch pans.
#25
Posted 12 April 2005 - 09:42 PM
#26
Posted 12 April 2005 - 10:27 PM
Fresh air doesn't promote the growth of contams, stale air does.
I don't think you have to worry about bringing air into your setup so much as getting the stale air out.
I have an unfiltered air pump and have had no problems with contams at all.
#27
Posted 13 April 2005 - 03:48 AM
Indeed, but "foreign" spores and bacteria are brought in with the fresh air unless it's filtered or otherwise cleaned.Fresh air doesn't promote the growth of contams, stale air does.
I really don't know why I'm worrying so much, even with taking the lid off completely several times a day and fanning lots of dirty air in, I very seldom get contams.
I have used an air pump to pump fresh air in, but they're all too noisy. Even with a good "silencer" plenum chamber, and the pump rubber mounted, the constant buzzing gets on my nerves!
#28
Guest_golly_*
Posted 13 April 2005 - 06:07 AM
#29
Posted 13 April 2005 - 07:55 AM
#30
Posted 13 April 2005 - 08:14 AM
75 is a good temp.
nice work
#31
Posted 23 October 2005 - 01:26 AM
#32
Posted 23 October 2005 - 07:07 AM
spore....
#33
Posted 23 October 2005 - 12:19 PM
#34
Posted 23 October 2005 - 01:02 PM
#35
Guest_dial8_*
Posted 24 October 2005 - 08:32 AM
#36
Posted 24 October 2005 - 08:52 AM
#37
Posted 21 February 2006 - 12:23 PM
I just run a tube from my air pump into my tub and I don't even fan anymore. The cakes fuzz up nice and good and there seems to be lots of humidity. I still mist but its out of habit really.
Running the cool mist results in lots more work IMO. It's a fire hazard if it runs out of water. Can result in too much water in the tub and so on. If you want lots of humidity just increase your perlite. I use 3 inches in my tub and have no problems at all. Much simpler than the cool mist setup that I originallly started iwth.
^Complete Agreement with Everything Chill Said^
Using a coolmist instead of an air pump will complicate your setup on many levels, leaving you, of course, with a much more complex system.
Complex doesn't necessarily equal bad, but it does mean that more things can go wrong.
Aquarium air pumps require NO maintenance.
The setup you described doesn't seem like it would benefit from the output of a humidifier.
Aquarium air pumps for tubs (especially tubs with perlite humidification)... Humidifiers used in conjunction with a separate air exchange system for larger spaces like greenhouses, IMHO.
You may even be able to run the air pump constantly...
Check these things out: http://www.petsmart....=gang valve&N=2
Peace, AS
#38
Posted 21 February 2006 - 01:00 PM
How about a clothes dryer outside vent? Don't they have some kind of flapper valve? SHouldn't be difficult to make a small one.Python: I have considered attatching some sort of piece of pastic that open with the force of the air coming out of a hole, but have not found something suitable yet. I was wondering if you had an ideas you might want to share, as I'd like to test this out in the nmext few weeks. If it works, maybe its something we could both use.
#39
Posted 21 February 2006 - 01:14 PM
#40
Posted 21 February 2006 - 03:35 PM
For ultra-simplicity and cheapness, I've had great success just putting whatever type of containter (cased spawn bag, straw tray, BRF cakes on lids, etc) inside a larger rubbermaid tub that I clip window screen over the top of and then lay a wet towel over. I leave about an inch of exposed screen around the edge for air, and I just keep the towel wet (with a little bleach mixed in, needs water added every other day or so). It's "The Towel Tek", I guess.