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The Tunze Osmolator Nano 3152 Auto Top Off is designed for smaller tanks up to 55 gallons. One of the safest ATO’s available and utilizes a single sensor to monitor water levels and a controller that protects against overfilling.
Designed specifically for smaller aquariums, the Osmolator Nano 3152 is a slimmed down version of the full sized 3155 model. It includes a processor-based anti-overfill system which turns the pump off if after five minutes of filling the level has still not been reached.
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