This special 3X concentrated version of the Clear for Ponds is the #1 problem-solving water treatment for ponds and lasts up to three times longer than the standard version, extending the time between refills. Aquascape Clear for Ponds XT contains a concentrated formulation of ingredients designed to eliminate unsightly water conditions, solving even the most stubborn water quality problems. The specialized formulation contains a blend of clarifiers designed to clear cloudy or discoloured water and reduce debris that attaches to rocks and gravel. Clear for Ponds XT also contains a powerful phosphate binder to lock up excess nutrients that may otherwise cause water quality problems. Clear for Ponds XT is safe for fish, plants, pets, and wildlife. Available in either 2L bottles for combining with other treatments in the XT doser, or 3.8L for using in isolation.