Why did my little Alfred die? (ACF)

[mpmistr]

I would switch substrate to bare bottom or smooth sand (avoid the sharp stuff) or large pebbles (though I find these hard to clean).

Reptomin would of been a lot better for your frog than the freeze dried stuff, honestly I would just toss that stuff out because it's really not a good staple food for ACF (or anything else for that matter).

10 gallons is the bare minimum on most care sheets and yeah 13 gallons would be okay but me -personally- I think ACF need larger tanks to be happy, though I doubt this led to any premature death.

Did you have a filter of any sort? Biofiltration is really kind of a must for these frogs, large water changes are good now and then but I would rather have a filter and do a 50% weekly water change.