I have a wp25 wich is to strong for my 40 gallon breeder,I know they sell variable power supply 12v to 24v for these pumps to slow them down.I found a post on another site where some one was using a Power supply from his old Linksys router ,that is 12v and I believe 1 amp.i found my old links router and it does work ,the one they sell has a 12 volt setting on it ,should I worry about it buring out the controller or worse causing a fire.