Brand: Crystal Clear
Treats up to 2,500 gallons for 4 weeks. PondShock by Crystal Clear was rated the readers' poll 2016 pond product of the year! Powered by billions of natural, live bacteria & enzymes, PondShock immediately goes to work to clean up organic waste and debris.It is also designed to jump-start your biological filter by helping remove toxic ammonia and nitrite. Easy to use, simply toss the ball and activating gel into the water and watch your pond become shockingly clear!