Hey I have a Gin Matsuba that takes flying leaps all the time. Everything in the pond is ok. I have worried one day she is going to jump out of the pond because she jumps so high, she come completely out of the water. Only one that ever does this. My first reaction to this also was that something was wrong with my water. It was not of course, she just likes to jump
By the way she is so beautiful, snow white shiro and a good thick body and I got her at petsmart.
Never thought I would get a good one somewhere like that but I did, good matsuba pattern also with no yellow at all on her.