I've previously had a couple of highback arowana that were unfortunately both ended up being suicidal. Very expensive learning curve!
Here's what I learned along the way...
- use the plastic trim on back of glass canopy panels that I always remove (1st aro)
- forget about plastic trim and glass canopy panels
- have glass shop cut 1 piece lexan 1/4" thick panel for tank lid with rear cut outs for plumbing and 2"" diam finger holes for feeding and removing
- use plastic canopy trim on lexan panel around plumbing cut outs and place 2.5lb dumbbell plates over feeding holes when not feeding (2nd aro)
Okay, I can see how the 1.5"" gap behind regular glass canopy back end would tempt an escape, but a 9" fish jumping straight up through a 2" hole with a dropped water level and an FX6 pushing him around is just insane. Well let's just say now I'm a fully convinced believer.
Those big eyes don't lie.
I'm awaiting the delivery of my 3rd arowana (panda gold supreme from dragonfish.ca) and have since made a tank lid out of barbed wire, concrete, carbon fiber, interlocking brick, re-bar, titanium and placed a pair of bald eagles on top of it, as back up I have installed infrared sensors and an 1,000,000,000 volt electric arowana air traffic defense system. However, leaving nothing to chance, incase that is not enough I will be keeping watch from the couch with bear mace, stun gun and an AK-47.