I have not used the Wavy Seas or Sea Swirl, but have an Ocean Current Rotator and a Pulser. Both work very well, but they are really much larger than you think by looking at their web site. They are really best installed on a drilled closed loop. The angle of the inlet makes them stand out from the back wall a good bit if you are using a drop pipe. I only used mine for about a week and took them out because of their size. Also because they use water flow to spin an impeller they would need to be cleaned on schedule to keep them from stopping.