All I know is that when I transferred my 12" arowana, 15" vittatus, 12" datnoids. 9" stingrays, the bag method worked perfectly. The old fashion nets r good, only issue is that with arowanas or tigers, u would need a second net or cover ur hands over the opening to prevent jumping out. I have no idea how ur jardini busted through a plastic bag. The big monster plastic bags from the LFS r so thick, I just dont know what to say about the jardini breaking through it.
The Jar was over 2', didn't fit real well in any bag I had but big black construction type bags. Have no idea how it happened either but it shot right out the side, skipping across the kitchen floor. I guess I just tend to think if they can bite through a rubber net if they get the right hold they're going through a bag too. Some of them teeth are purdy sharp! Some of these things can cause serious damage to a guy if instinct kicked in an you just went and tried to pick up a toothy fish in the event it's on the ground. I recently took some under jaw wolf pics and handling these things is something I often overlook, it can "get real" real fast - scary quick.....lol
I'm also not too keen on putting hands in the tanks here so using nets makes the most sense. I've always wondered how big or small a wolf could be and still be capable of removing a finger. Definitely not a good idea to stick your hand over the top of the net with toothy stuff, lol I just use a second net - the ol clam shell method.