I had the same thought when I saw the previews of that show - I never actually watched an episode but from the preview they looked pretty reckless. Quite a few things I saw looked completely impractical from a cleaning/maintenance standpoint.
Is it worth watching, or do they just fill random crap with water and yuk it up for the camera like every other "reality" tv show?
It's the aquarium version of Pimp My Ride. Actually both are really reputable and do amazing work for regular customers who want something that isn't interesting enough for a TV show for non hobbyist.