Wow, really good "food" for thought Waterbug, extremely well thought out. I think I've done a really great job on the 200g pond, so I'm hoping to do just as well with water quality on the bigger one, and I really hope that I can support a really nice school of koi. I really don't care about size, I want them to be bigger than fries, but how big they get doesn't really matter to me, and because of that I've been feeding only in the mornings since I fired up the pumps this spring. They've all grown very subtly, nothing extreme at all. I'm super happy with that. I've been thinking about feeding less to allow them to eat more algae, but in the new pond there is no algea so I'll probably have to do 3 times a day for most of this summer otherwise I'll have some dead fish and it won't be a mystery what killed them. I think I'm really happy with all of the decisions I've made so far, and the 6 butteflies I just ordered are definitely going to be welcom additions. Thanks.