RO unintentionally killed the koi fish in the our pond. He feels very bad about it.

The pond has algae problems. RO bought a gallon of algae killer and poured it into the pond. Then he read the instructions. The pond only needed one cup of the algae killer.

Withing a few hours the fish were moving slowly and hanging out at the surface. By the end of the day some of the smaller fish died. Over night, racoons came and ate the rest.

RO has been beating himself up over this all morning.