Yes they are a bit limiting in weather below -5DegC this one says it works down to -15DegC but in my experience they struggle at less than -5. Do you have any heating on your koi pond? we have a lot of trouble with temperature fluctuations suck as last week went from -3 at night to 13Deg during day which is not ideal for koi in ponds.

@@AdamJulyan I'm fortunate in that I have a 2000 gal US pond in my basement where I overwinter my koi. (The summer they spend outdoors in my 5000 gal US pond.) I don't know of anyone in Canada who heats their pond. Most people use a pond deicer/small floating heater to keep a small opening in the ice throughout the winter to allow for gas exchange. The fish go dormant from late November to late May/early June in most cases. Some people do build a poly tunnel over the pond for the winter and that does help delay the dormancy period by a few weeks and end it earlier in the spring.

About £1800

I paid 1720 for mine at koi-zone. Depending on the ambient temp, it cost about 2/day to heat my uncovered pond.

Tell me about it i haven't had a job go that easy in ages. yeah it'll be spot on that pond when its fiberglass it'll also simplify the pipework a bit. hope you have a good week too thanks.

Yeah it's totally worth it, It was my first heat pump id say about 15 years ago and its the reason i got one for my fish house and the main house. Best to find a AC company to install it that does heating and cooling and they aren't that expensive usually a similar price or cheaper than a log burner which is why i have no idea why people buy log burners.

Thanks for your reply I'm going to look into this. Atb Paul