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Entries from May 2008

Green Water

May 31st, 2008 · No Comments

I cleaned out the pumps (a few small Tilapia found their way into the intake) and put screens around the intakes.  Then we had two hot sunny days in a row and the temperature is up to 73F.    Now the fish are eating.  But the water has turned green. We completed a few floats and [...]

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More Fish

May 24th, 2008 · 1 Comment

Last night, I stopped by Aquascapes on the way home from work and picked up 2 good-sized Pacus and an 11″ Orange Koi.  He’s no prizewinning Gosanke but he’ll do for now.  We’ve had some technical difficulties with the solar collector  — and some cloudy periods — but the water is hovering around 65F.  Some [...]

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Design details

May 21st, 2008 · 2 Comments

I think I have settled on a design to reduce “root pruning” by my voracious omnivores.  I’m going to try hanging a bit of window screen below each 2 x 4 tray of foam.  I’m going to try using foamboard adhesive , staples, and a small plastic strip to attach the screen to the foam.  [...]

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Details, Details

May 20th, 2008 · No Comments

I spent Saturday doing body work on my flower/vegetable delivery van.  I thought it came out pretty nice.  Also, the sending unit for my fuel level gauge was showing open (so the gauge thought the tank was full all the time)    I read on the internet how someone cut a hole in the floor of [...]

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Another partly cloudy day — water temp up to 60

May 14th, 2008 · No Comments

Emily turned on the pump and fan about 11:00 this morning.  The sun was in and out of the clouds all day, but it managed to bring the water up slightly above 60F. 

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Temperature up to 57F

May 13th, 2008 · No Comments

Today the temperature in the tank got up to 57F.  Not bad considering it is 2000 gallons of water that started at 40F.  That’s a 17F rise in just over 36 hours.  Almost 300,000btu.   And today was partly cloudy too.  I’m already dreaming about building a solar collector for domestic hot water.

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Car Radiator as Heat Exchanger

May 12th, 2008 · No Comments

I got the idea to use a car radiator to heat/cool my greenhouse from a guy in Australia. http://njhurst.com/publications/renew-final-2.pdf

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More leaks

May 12th, 2008 · No Comments

A design flaw –  the gutter cannot seem to handle all the water that the  pump delivers.  Perhaps a smaller pump will do the trick — or a modification to the downspout.   In the meantime, the radiator/fan combo has managed to bring the temperature of the tank up to 51 F.

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Solar heat

May 11th, 2008 · No Comments

Yesterday I lined my 4000 gallon plywood tank in the small greenhouse.  Today I put 2000 gallons of water into it.  The water coming from my well was about 41 F.   I rigged up two solar heat collectors to capture the excess heat from the greenhouse and store it in the water.  The first (and [...]

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Measuring PAR Light

May 9th, 2008 · 1 Comment

I need to measure light levels in my greenhouse — but I’m mostly concerned about the narrow band of light in the 400 to 700nm range referred to as Photosynthetically Active Radiation.    The most economical ways to measure PAR light that I have found are the Apogee QSO-SUN quantum sensors and  a novel way of using LED’s [...]

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