This Ionizer is amazing! I have had it for my 32 x 16 above ground pool for 2 years. The only chemicals I use are to open and close the pool. No more Chlorine, no more Algecide treatments, nothing! Just balance your alkalinity, plug in and you're done. Highly recommended and virtually no pool maintenance outside of vacuuming. The picture was taken in mid August, opened the pool 1st week of June. Zero maintenance except regular vacuuming when needed. Will change your life.