FWIW reefried i just took a peek at one of the eco systems mods, although nice and almost an exact copy more so of the ocean flow ( the basket around the impeller is slimmer than algae free's ) It has no stopper, therefore it's preety useless on a wavemaker. Other than that its great for constant flow.
From what the specs say on marinedepot it DOES have a "stopper" or anti-reverse flow technology as they call it...FWIW