Swamp Treat is United Chemical's strongest algaecide. It accelerates chlorine so much that it can turn a dense green pool to clear in 24 hours or less! It can also eliminate the need for follow up shock treatments, saving you money and time. Add one bottle of Swamp Treat per 20,000 gallons of water. To prevent algae from coming back, No Mor Problems may be used in conjunction with chlorinating and brominating products.