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Propagation table heat using micro tubing and aquarium heater?

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Posted by sdgrower CA - 10 (My Page) on
Mon, Nov 8, 10 at 15:51

I would like to build a 8 X 4 propagation table which provides bottom heat using rows of micro tubing spaced 2-3" apart, running the length of the table, that are pump/cycled with hot water. Many greenhouses use a similar setup, but have natural gas powered water heaters providing the hot water.
Since the area I wanted to heat is fairly small, I was wondering if I could use a decent size aquarium heater (300W) or multiple aquarium heaters and a 10 gallon tub to heat the water.
The aquarium heaters will only heat the water to about 90 degrees, so I was unsure of if that would be enough? The ambient temp will probably be around 50 degrees and I will need the setup to provide about 70 degrees of temp, but only in the evening.
Anyone with thoughts or experience doing anything like this please share!

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RE: Propagation table heat using micro tubing and aquarium heater

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This might be a better idea no leaks to worry about.

Curt http://forums.gardenweb.com/forums/load/lights/msg0919115510935.html?1 1

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RE: Propagation table heat using micro tubing and aquarium heater

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Your idea has merit, this guy is using a 200 watt and about 4 gallons of water for his worms in an unheated garage An extra thermometer and it should be good to go.
http://www.redwormcomposting.com/worm-composting/heating-a-small-worm- bin-in-the-winter/

Curt

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