I am currently using a Stenner for automatic water changes. I set it up on a timer, runs every 1 1/2 hrs and changes a 1/2 gallon at a time. I have a total of 8 gallons a day on my 240 gallon display with a 110 gallon sump. REALLY nice! Sure makes things easier. Now, if they would only invent something that automatically cleans the glass!
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