One other thing I wanted to mention to help him survive. I'm not sure what you feed him, but Trex can testify to this too, silversides have contamination issues that have killed more than a few Haddoni's.
That blue is too nice to chance it. I'm hoping he didn't stress spawn and will last for years. Just avoid trying to propagate him. There is no evidence that a Haddoni has ever been fragged and lived. They do ok shortly after, but decline until both frags die.
Feeding a human grade food (seafood mix) from HEB or Kroger will be a safe choice. Not to mention, it's cheaper. Just take a few pieces out and cut them up small...Like the size of a pencil eraser. Then freeze the rest. Smaller sizes help them digest it well before they just spit it out- half digested. Limiting feeding will keep him small. You can get away without feeding at all if you want him to stay the same size. Haddoni's are know to get very large- fast.
