O2 TUBE TECHNOLOGIES is in the business of providing DO to groundwater projects. We use 4 electrolysis cells down 4" well where the cells generate DO in the groundwater. We use a draft pump to circulate the DO inriched water around each well. Each system treats about 3,000 sq. ft. It cost about $25.00 a month to operate one system. We have a solar system where there is no energy cost to run the system. Our website is www.o2tubetechnologies.com .