I would not cheap out when it comes to an auto top off. I did and had it running right off my ro unit i flooded my house and lost a lot of stuff in my tank as i pumped about 100 gallons of freshwater into the tank while i was at work. I would recommend a tunze and have a reservoir to prevent anything like this happening.
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360 gallon sps reef, 180 gal sump, bubble king supermarine 300, 4xmp40Wes, 2 x 6215 tunze waveboxes, 4 ghl mitras
360 Reef Tank
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