While cleaning out my koi pond I found frgos in the skimmer. Probably because the skimmer is black and it is likely warmer in there. They are nasty muddy looking buggers. Last spring I found only dead frogs in the pond and don't want these guys dead. I will be taking the pump out so the skimmer will likely freeze - I am in northwestern PA. I just started a greenhouse that is about 60 degrees. So I move the frogs there, what do I feed them? Leave them in the pond. or do something else.