If you have any local marine club members, I'm sure someone would be willing to help out in this regard. Since these fellows are short lived and you never know.... you surely would not want to take the chance of him picking while you were gone and fouling the water enough so that everything else is also wiped out.
If you aren't sure if there is a marine club anywhere near you, let me know where you live and I'll check MASNA's club database.