Solar Hot Water Heater for Fish Tanks

OK...so I got the great idea of building a solar hot water heater out of black poly tubing and having that connected to one of my fish tanks in order to cut the electric bill down on the aquarium heaters I run. I am having mixed results, with a net gain of 4-5 degrees over the ambient temperature of the fish tank water. I was expecting much more.

Initially, I placed 75ft of poly tubing into a 4'x4' box (2x4's) made out of Dow blue board and clear / white poly carbonate panels with the inside painted black as shown in the video.  This is all connected to an Aquatop 496 GPH submersible pump which has been choked down to about 250 GPH to give the water enough transit time through the pipe to heat up. I found that I did not have enough pipe so I added another 100' to the existing pipe, I am in the process of sealing the box, and I will need to use glass on the front to better trap the heat as the poly panels don't do a good job. I have a resource to buy cheap used windows and will be heading down to look for one soon.  I have posted some pics of the unit as well.

 Until next time....

Insulation added to the Greenhouse

With the upcoming weather changes for fall/winter approaching, I decided to bite the bullet and put up some radiant type / bubble insulation with an R3.7 value. I placed all of this on Saturday last weekend and stapled it in place using a an Arrow T-50 stapler. I used approx. 8 - 2' x 25' rolls, and a single roll of 4'x25' for the IBC Fish Tanks. This material was placed along the end and side walls, and also along the roof trusses. This also provides extra reflective light back onto the plants for added growth.

We had a cold snap this morning which dropped the temp down to 52 degrees outside. With the insulation in place and the greenhouse closed up the temp stayed a balmy 74 degrees.

Not bad for this amount of insulation, of course winter has not set in yet, so for added protection I have purchased a small ceramic based heater which I will use to supplement the natural radiant heat of the greenhouse. I also have purchased a digital dual 500 watt Titanium aquarium heater unit which will be placed in the Fish Tanks to regulate the heat during the winter.

Next up, the building of an Aeroponics cloner/seedling starter system.