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Thanks ttodd1, I guess I missed that part. I followed Northmans advice last night an added 2 tsp of Dichlor after use. This morning the free chlorine was almost nil but the spa was crystal clear, better than it has been. Much less 'green'. I hope this will be ok. I wonder if I could use MPS before getting in and then Dichlor on the way out?Tony,Do you alternate between the dichlor and MPS shocking? Jonathan
Chas,The HS owners manual (pg.52) states that the Free chlorine level should register between 3-5. But everytime I check the next day my level is about zero. The manual says to not use the spa if it is below 2.0. Is it safe to enter the spa with a reading of zero?