<a href=showthread.php?s=&postid=14801539#post14801539 target=_blank>Originally posted</a> by WaterKeeper
Alex,
It seems that squids, SCWD's, vary in their reliability. As they use a type of Venturi with a moving flapper valve to produce the wave action the moving part are subject to coralline buildup and that will cause them to stop making waves.