sbv , 2 months ago Effluent is considered acutely lethal when, at 100 per cent concentration, or undiluted, it kills more than half the rainbow trout subjected to it during a 96-hour period, regulations say.
Effluent is considered acutely lethal when, at 100 per cent concentration, or undiluted, it kills more than half the rainbow trout subjected to it during a 96-hour period, regulations say.