PSALTXXLG Size: 50 lbs Features: -At 0.2pct salt level there may be harm to some tender aquatic plants.-0.1pct salt solution = 0.83 lbs of salt per 100 gallons of pond water.-0.2pct salt solution = 1.67 lbs of salt per 100 gallons of pond water.-0.3pct salt solution = 2.5 lbs of salt per 100 gallons of pond water.