What are Normal Daily PH fluxuations?

[MikeM]

Farne: Yes, I think a Bakki-type filter affects water temps. I loosely wrapped mine the first year with plastic. There was plenty of fresh air for gas exchange, but it was definitely warmer under the plastic on cool mornings. I now leave it alone in an effort to reduce the pond temperature over winter months. ...different challenges in different places.

[farne230]

Thanks Mike for clearing this up. If anything maybe BS would warm things up, ha ha, sorry for the confusion. I had heard the claims that BS would act as chillers being they are in close contact with plenty of cool air, but had not checked to see how much of a differance until Ray Jordan measured his water temp and I checked mine at about the same time. The differance was a 5 degree drop in temp. I also have my BS covered with burlap, and the pipe are wrapped in insulation and filters covered with burlap and plastic. I will keep you informed when I get the heater installed.
Bob

[bekko]

Showers and TT's expose more water to the atmosphers and increase the rate of evaporation. Evaporation is endothermic - it gives off heat. Same principle as the old redwood swamp coolers used in buildings before air conditioning was common.

-ste veh