Is is possible to use a speed controller (like a light dimmer) with a small pond pump?
I have a Bermuda 3000 (3000l/hr) submersible pump that's really a bit more powerful than I need. The motor has a solid rotor that appears to be made of a ferrite like material.
I know that speed controllers can cause overheating problems with some motors but given that it's underwater with water bathing the rotor, I don't imagine this would be a problem in this case.
Tim