How to heat 3000 Gal pond without commercial pond heater?

[batang_mcdo]

is there any way to heat a 3000 gallon pond without commercial pond heater?
our temperarure has dropped to 23 Deg celcius, and i'm not sure how low temp my arowanas in my pond can handle. anyway to bring up the temperature safely by 2-3 degrees?

sun has not been coming out much past few days.

 

[celebrist]

Heat exchange maybe?

 

[markstrimaran]

Cover it with a tarp. Large visquen plastic sheet.

 

[batang_mcdo]

oh... thanks!! that should bring up the temperature a little?
I'll buy some

 

[markstrimaran]

A black one would

 

[batang_mcdo]

Will covering the pond with 1 inch styrofoam work the same as covering it with tarp? I'm planning to get 3 pieces of 1 inch thick styrofoam and just trying to use it as cover on my pond. Sunlight does come out during the day.

 

[markstrimaran]

Might look into actual swimming pool covers. Might have ready made, designed products.