I am looking into getting an RO/DI unit but I truly do not think that the quality of the water I am getting is not good. I've been using it for the last 3 years. And as I said I know several reefers with stunning aquariums and are using this unit. I think at this time the most suitable solution is to perform small water changes for a week or so using the water I will first run all chemical tests on. I do not use conditioners but if you suggest I ought to use them, I will. I typically leave the water being mixed with a power head overnight before adding it to the tank.