"NetMax" wrote in message
...
"Bill Stock" wrote in message
...
I thought there was a thread a while back started by John, who wanted
recommendations for a heater in a large tank. But I googled and could not
find it.

The tank in question has a radius of 34" and a depth of 24", but I'll
likely keep the water at 18". This is roughly 200 gallons. I tried a
couple of heater calculators on the web, one said 28W (LOL) and the other
said 700W. I was hoping for less, but I imagine the 700 is close.
Although the same calculator said I need 300-400 watts of light for my 55
gallon. My poor Cardinals would need sun glasses. I only want to raise
the temp about 5° F on average.

If it wasn't a circle, I'd send you here
http://www.kernsanalysis.com/HeaterCalculator.cgi
but if you try it anyways, enter a set of dimensions, close to a square
which corresponds to the volume, and then it might be close. You lose
less on corners ;~) but more on the increased surface area, so it might
balance out.

I think that's the one that gave me 28W.

My guess... hey... when filled, this is a 300g above-ground pond with a 6'
diameter! I want pictures! My guess would be 500W actual, at least 600W
installed (or 400W/500W at 18").

Yeah, but it ain't pretty; it's my Franken-Pond. Fortunately it's hidden
away in a basement ante-way.

I was thinking of running the lights (arrived today) by night and trying to
use my 350 watt heater from last years outdoor experiment to maintain the
heat during the day. I'd actually like to build a Solar wall as an
experiment, but I don't have the time or $$$ right now. I think this will
have to wait for my subjects outdoor experiment next year.


--
www.NetMax.tk