The wavelenght of the Arc is to high to kill water critters. ;>(
Acording to this site, "...Given proper dosage, UV wavelengths ranging from 240 to 280 nanometers (nm) deactivate, or effectively kill, microorganisms by damaging their DNA so as to prevent the DNA, and the organism, from replicating (Harm, 1980)..."What wavelength do you need
Steripen!!!!!!!