Thanks for these!
I had found the sw2 and was considering it actually :)
I didn’t know about the new so4 though thank you Andy! My only concern is it may be a bit out of my price range for now compared to the others but I might hold off and save for it
The SW series are still pretty good wave makers, I've had one for about 18 months. They're quiet and reasonably reliable as long as you keep on top of maintenance*.
* once every two to three months, remove from the tank, disassemble (very easy, they twist apart), scrub all the bits with a toothbrush to get algae off and leave in 50/50 white vinegar/RO water over night. Rinse in the morning then back in the tank. 👍
The downside is there is no easy way of getting spares that I've found, so don't drop any bits down the sink!!