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Amazon Shop for: ½ Pint Jars, Air Pump, Air Stone, Coir, Peat, Vermiculite, pH Test Strips

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Registered: 01/21/02
Posts: 1,996
Loc: A little North of Paradis...
Semi/automated small bulk substrate grow chamber
    #1293110 - 02/09/03 10:38 AM (13 years, 8 months ago)

Someone asked my how I would rig up a small semi/automated grow chamber, for use in limited space situations.

So, here is what I would do for a small semi/automated grow chamber.

Get a foot locker size Rubbermaid or Sterilite storage container (bigger is better).

In the lids center, install a single Christmas light bulb (small - so as to not overheat the container - but will provide light).

Get a 1 gallon glass jar (like big pickles come in).

Get a small fish tank air pump.

Get some fish tank air line & a small air stone.

Get a small cheap inline filter for the air pump line (tropical fish stores have them)

Get a small fish tank heater that will attach to the 1 gallon jar.

Get a small timer (or 2).

On the edge of the low sides of the Rubbermaid drill a few 1/4 inch holes (one centered on both ends & one centered on front & back. Stuff holes with polyfil. It is important the holes are low, to allow O2 to escape.

Drill another hole for the air line into the Rubbermaid (or, install a fitting with male ends inside & out - to attach air line to)

Drill another hole for the fish tank heater cord (seal after running it in).

Fill jar with clean water, place fish tank heater in it, place in the Rubbermaid.

Place air stone on air line & place in bottom of gallon jar & run line to air pump.

Hook air pump to timer.

Hook light to timer.

Place a small thermometer in the Rubbermaid.

You now have a small semi/positive pressure semi/automated grow chamber.

The fish tank heater inside the water filled jar will provide both heat & humidity.

The air pump to air stone will provide gas exchange, moisture diffusion & semi/positive internal pressure.

When you refill the water jar, it is wise to add 1 drop of iodine, to disinfect the water.

You can also drill a small hole halfway up the container end & plug with polyfil. Purpose of hole is to allow external misting (if needed) without opening the lid.

Use approximate 10 quart dark plastic dish pans as substrate trays. It is important that you fill them almost full of substrate, leaving only room for a pH balanced casing layer (peat, verm, coir). You want then FULL, so O2 will run off them.

Run light 12 on/ 12 off. Run air pump 2 on, 4 off to start, then adjust as needed. Tinker with the heater & adjust as conditions require.

You will have to tinker with all of it to get it tuned in (as everyone's conditions, temp & ambient rh differs).
6T (aka Mycota)

~whiskey river rafting, hot tubbing, dirty dancing & spending money on - wild women - having fun & just gonna waste the rest~

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Registered: 02/02/02
Posts: 64
Loc: everywhere
Last seen: 13 years, 7 months
Re: Semi/automated small bulk substrate grow chamber [Re: SixTango]
    #1293150 - 02/09/03 10:58 AM (13 years, 8 months ago)

nicely said sixtango, my setup is nearly identical and it works great!

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