There has been quite a bit of fuss over the SCWD's, the concept is great however they seem to really need a high volume pump to overcome the head pressure created by the switching mechanism and reports have it they appear prone to a rather short life span, or at least requiring very regular maintenace as a preventative to failing. Means regularly removing it from the return system for cleaning, since it's almost always below the water level the odds of a very wet floor/carpet go up dramatically.

Overall turnover in the tank has been reconsidered by the 'experts' in the field and the opinion is that a turnover rate in the order of 30-40 times the tank volume to be more beneficial not only for stony coral but for all, provided the overall flow is of a wide dispersal pattern and not laminar streams just blasting away at certain areas of the tank.

From that, currently we have a pair of the Seio M1500's plus the two return pumps brings up the turnover to a little over 4000gph in our 180, so we are going to add another pair of them (likely the M2600s) in the next week or so to double the current turnover rate and create some chaotic turbulance. The tank is heavily populated and fed often so this should help keep excess organics and things suspended in the water column much longer to be skimmed away.

--Tyler, I like the new avatar!