Products & Services › Silver Lake In-Water Treatment Image 1 of 1 Silver Lake In-Water Treatment from $418.60 In-water treatment occurs in the summer. 2025 treatment date is Thursday, July 17th. Area: Select Area 65 ft 70 ft 75 ft 80 ft 85 ft 90 ft 95 ft 100 ft 105 ft 110 ft 115 ft 120 ft 125 ft 130 ft 135 ft 140 ft 145 ft 150 ft 200 ft Quantity: Purchase Added! In-water treatment occurs in the summer. 2025 treatment date is Thursday, July 17th.