he/she sounds very aggressive and really fooking pissed with you m8, try putting another in there with him/her and see what happens, u never know he/she might want a mate
Some fish just jump. Some do it when the water isn't to their liking. I didn't read all five pages of the thread but you need to get your own test kit no matter how close your lfs is unless they are open 24/7. Just my thoughts.