I use Seachem Equilibrium. I have tried Kent RO Right a couple times and had horrible results, the last time I lost a tank of fish, it happened within minutes. I got mad, decided I would never use that product again and started dumping it down the drain. At the end of the bottle a brittle white precipitate came out. Even with a good shaking before use this stuff would never mix. I saved the bottle, and I emailed Hagen and never heard back. Not even a automated response. Bad product bad customer service.