Star brite Instant Black Streak Remover 22 oz Spray

Instant Fresh Toilet Treatment is a simple one-step, highly effective way to deal with the boat's holding tank that eliminates the need for multiple chemicals. This efficient, biodegradable formula quickly breaks down waste to remove potential odors, while leaving a light, pleasant scent behind. Additionally, special lubricants prevent drain valves from sticking. Also works in portable marine toilets.