In Experiment 2, no fish died in challenges conducted in un-altered
WARU water, WARU water filtered through activated carbon, or
SNARC water filtered through ion-exchange resin. The only mortalities
were in the challenges conducted in un-altered SNARC water
(Table 3); the experiment was ended 4-d post-challenge. Bacterial
adhesion to gill tissues was highest for fish challenged in un-altered
SNARC water, followed by fish challenged in ion-exchange-filtered
SNARCwater. Bacterial adhesion did not differ significantly for fish challenged
in un-altered WARU water and carbon-filtered WARU water,
whichwere both lower than for fish challenged in either SNARCwaters.