Hi Dick,
I still try to keep on top of my pond maintenance even through the winter,this will not be as much as in the summer because obviously i don't feed as much but try to keep the pond as clean as i can
I live in an area which has very hard water so run RO so i need to keep an eye on things so to help me to do so i have monitoring equipment that runs 24/7/365 so i can walk in and see what my Temperature,,PH,TDS & ORP are at any given time.I also heat and at the moment the pond is running around 12.5c the PH is 7,TDS 200,ORP 350ish.