hi. I have a good sized pond (clay bottom). My goldfish overwintered no problem and were out and about (easy to see) last month, where they were nibbling at the pond's fringe or just haning out. Two Koi were introduced a few weeks ago, little ones, the size of the gold fish. I haven't seen a single fish for going on two weeks. You can't see the bottom and they often hide away there, but I'm worried and think it's unusual that they aren't coming out.
Any words?