jason,
1/16 holes will cause your tea to boil great, however
they are probably to big to diffuse enough O2, especially when they need
it most. I did the same thing and i wasnt getting enough O2 into it. I sourced
some 0.4mm drill bits- equivalent to about a 1/50th (you need a few as they
tend to snap pretty well). Also attached some of that seepage hose that
have even smaller holes. Still boils great, but the bubbles are just that
much smaller! Even when you switch it off it bubble like a bottle of mineral
water for minutes!
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Original Message -----
Sent:
Sunday, April 20, 2003 9:44 PM
Subject:
Re: [compost_tea] Alfalfa tea and Kelp tea
I have just made my own brewer
- 500 gallons - round tank with flat bottom. Approx 5' diameter.
- 1/2 hp Gast air pump
- for aeration I ran a 1 1/2" sched 40 pipe into the tank, formed a cross
at the bottom, and drilled a series of 1/16th holes along one edge of
each leg of the cross. It boils magnificently!
I am waiting for a heater element to arrive so have been experimenting.
First I tried water for 24 hours to test the air blower and some small
aquarium heaters that I had been assured would heat the water. The aquarium
heaters only got the water temperature up 2 degrees C in 24 hours.
Then I tried 10lbs of alfalfa pellets in 400 gallons of water.
After 18 hours there was a 5 degree C rise in the water temperature (still
with the aquarium heaters) and 4" foam.
After 24 hours (midday) both air temp and water temp had risen to 18 degrees
C - I added 1/2 cup of mollasses.
After 36 hours (10pm) air temp had fallen to 11 degrees C but water temp
was still at 18. 6" foam
After 44 hours (6am) air temp down to 8 degrees C but water still at 18!
Now a pleasant healthy earthy smell around the brewer.
The tank is under cover in my open tractor shed. It is not insulated
and is completely open at the top, so I must be losing heat, but despite
that it has kept up at 18 degrees C.
It seems to me there must be some considerable bacterial action taking
place even though I have no compost or activators. So far only alfalfa
pelets and mollasses.
Jason