fish don't like clear water
 

At least, I would say they have to get used to it. Even when I had clear
water for a while and then it turned green, it shook them up for a while
when I conquered the algae and could see them again. The fish in the new
pond still aren't happy about it. They seem to feel like they are in a fish
bowl ; ) I guess that would be worse than a pond, huh!? I'll have to go
tell them that. Maybe it will help.