Been traveling a lot and back. Actually been working on the pond in this cold winter. I was wondering what thoughts anyone might have on this. My pond maintains a 50F water temp all winter. Maybe on those previous 5F days, it dropped to 45F but mainly is 50F. Though I've been doing this 25 years, I was wondering if feeding once here and there ( non protein ) would be a problem. Skimmer runs but bio is drained. I check ammonia, pH, kH, nitrites etc during winter and add baking soda to keep up kH. So, all is well and these boys and girls are specimens of health. Sometimes they're just hanging 4ft down and sometimes swimming around slowly if the sun is bright and shining on the pond. Not sure who is familiar with Manda Fu but it's a non protein based almost treat like food. Think it could hurt??? Probably would take 3 -4 days to digest at 50F but I'm probably thinking at 50F, they might need some nutrition since the pond isn't in the 30's with ice and a hole. Thoughts? Thanks all!