Reef Builders Posted December 16, 2019 Share Posted December 16, 2019 There once was a time that every serious large reef tank was on track to become outfitted with a closed loop for providing water flow throughout the aquarium. Right before any kind of propeller pump became not only an option but THE option, there was powerheads in the tank, or a purpose built closed loop system. […] Source Read the full article at Reef Builders Quote Link to comment
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