I got mine at the 4-5 inch range. Kept in a 56 oceanic cube until 7-8 inches and now in a 120. They seem to have stopped at the 7-9 inch range except for the albino who stopped at about 6.
Plec123;3327079; said:seems like they slow down at a certain size.
but would one be ok in a 38gal? 36" x 12" foot print... 20" high...