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Nothing is worse than hearing your tank chugging for water at 11PM... Getting yourself a 5 gallon bucket and a cheap ATO like this one is a worthwhile investment that prevents those late night headaches.
Amazon: https://www.amazon.com/Coral-A100-Dual-Sensor-System/dp/B015RM10H2/
https://www.reefbreeders.com/shop/coral-box-a100-ato/
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