Well thought out.
For me both a closed loop system with powerheads make sense (then again I gave up on energy efficiency). I like the closed loop as it is essentially failsafe, requires little to no maintenance, is hidden, and can provide random "general" tank circulation. Powerheads are always required later on as the tank matures and as flow requirements increase. Nice to see powerheads getting smaller and moving more water.
Look forward to more updates.
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