Water change

[daplatapus]

Originally Posted by Myka

So does one pump out while the other pumps in?

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Yup, one motor, 2 heads. I have mine drawing water from my sump where the siphons drain into it just before my filter socks, and the other one dumps water into the chamber that my return pumps are in. Set up that way, I figured my ato (Tunze osmolator) wouldn't see any change in water height in the return chamber. That way in theory they pump the exact same. Mine's been running for almost 7 months and I've noticed very little drift in my salinity