Originally Posted by
Cove Beach
As far as the gravel vac goes there is a thread in the filtration sectionhttp://forum.simplydiscus.com/showthread.php?134332-DIY-Powered-Gravel-Vac-%93-Sand-Hog%94
The gyres are XF230s running at 60% about 3” from the surface. They are just close enough to occasionally suck in a tiny bit of air. This is intentionally done so that during any power outage they will provide circulation and areation to the display as they are on a Icecap battery backup. This has already come in handy once. Im looking at a couple methods of nutrient export currently, but with a trip coming up I don’t want to make any changes and upset the apple cart.