John,
We started using ARENACLEAR™ in our indoor arena last year and it has been wonderful! Previously, we used Mag Flakes, but the cost for shipping and the product itself went sky high!! It made it necessary to find another alternative for dust control.
Since we changed to ARENACLEAR™, we have noticed that the horses are having fewer abscesses, the corrosion to the metal supports of the arena fence are better, and the texture has improved.