Wow my 3 year old thread is being bumped to the top lol. The fish was and still is fine. It's about 12-13" now and living happily as the only mid level swimmer in my tank at the moment with my collectin of shovelnose. Also FWIW Copper Safe is a pretty weak medication at least by volume, it takes a big bottle of it to treat the 240. I've since switched to Cupramine which takes literally a pipet full to treat the same volume instead of like 10 oz of Copper safe.
Flagtails as I have noticed jump when put under stress. I love feifengs. My guy is an aggressive guy he chases my pair of gt around the tank and killed my bichir by sucking his slime coat. Thats, ok I'll keep him by him self in a 150 if I have too. Love flagtails, just throw in some dithers like neon tetras.