I think (if I had the space!!) I would go for a sump in the end with a mix of foam and a moving bed of plastic media. Not only does it take away some of the risks of a closed system (BB DO starvation in a power outage, for one), I could really keep everything outside and massively aerate the water with very little inside the actual aquarium.If I had the funds I’d go for an ADA Superjet with a sponge on the inlet pipe. It’s a shame ADA don’t make one with a heater.
One day, Brad. One day........ [Fade in dream sequence]