Nice shots! It's a cool place, I spent hours watching the big aros in the ponds and the massive shoals of Amphilophus. The bonsai collection is amazing too.
I spotted several silvers and at least one yellow tail in the "Swan Lake", along with many giant gourami, Amphilophus Spp, snakeheads, turtles and of course the catfish.
The Zoo is the pace to go if you want to see aros though;
about a dozen or so RTG swimming in the pond around the orangutangs!
Your pics are really nice, looking forward to seeing more.