I have 8"-9" black arowana, 4"-5" pbass, 4"-5" flagtail, nine 4" thin bar silver dollar, two 12"-13" endl bichir, three 2" parrot, 5"-6" datnoids, 3" shortbody flowerhorn, two softshell turtles and one razorback turtle in my tank. I'm thinking of getting a 9"-10" GATF. (eating pellets). Do you guys think it's a good idea? Do you guys think the GATF will be aggressive and kill most of my fishes?