Is there a need for a heater for rearing KOIs?

do i need a heater? i feel that the water a bit cold for the KOIs.
i have 2 small size KOIs in a container.

anybody can advise?

[wllm33]

kois like goldfish prefer cold water over hot, unless they sick.
remember they come from japan initially.

Koi keepers installed chillers to cool the water. Heater not ideal for them.

thanks for the reply

save the money to buy a heater

Depends where u live. Koi's like water between 18-28 deg Celsius

Bros.

I am using CL450 to chill the water to 29 degrees, my electrical bill increases by about $60 per month. And my FGT is only 5 x 3 x 2.5 ft only. Water cap at 800 litres.

[TVR]

Originally Posted by Arofanic

Bros.

I am using CL450 to chill the water to 29 degrees, my electrical bill increases by about $60 per month. And my FGT is only 5 x 3 x 2.5 ft only. Water cap at 800 litres.

Hi,
What will be the norm temperature if you dont use the chiller?

Originally Posted by TVR

Hi,
What will be the norm temperature if you dont use the chiller?

Probably about 31 degree C. So my setting on the chiller is at 29 degree C.

Originally Posted by Arofanic

Bros.

I am using CL450 to chill the water to 29 degrees, my electrical bill increases by about $60 per month. And my FGT is only 5 x 3 x 2.5 ft only. Water cap at 800 litres.

Just wondering is it possible to attain 29degC with just an AC fan? Will it save on electric bill? Used to use fan for my smaller aquariums, but never try for such big FGT before. Unstable temperature and high evaporation may also be an issue I guess

[swlk]

I think Koi is very adaptable to our temperature. Only countries with winter need to install heater in the pond. Outdoor pond with plenty of sunshine is the ideal place for them IMHO.