Pros - Using many of their products, all perform extremely well.
Cons - None
Love my Tunze products, power heads and ATO. Customer support is wonderfully responsive and helpful via forums or email (I've never tried calling). Roger is the best! Hard to believe there is only one of him.
Pros - Reef2Reef Sponsor and Great customer support.
Cons - N/A
I have owned the Tunze Osmolator 3155 for well over a year and the benefits have been wonderful.The company representative is very helpful and responsive.If your are thinking of buying a Auto top unit,think TUNZE !