does any one work without a controller ? if yes how do you regulate the flow of water ?
After the pump outlet, I have a T piece/branch whatever you want to call it. One direction goes towards the reel eventually. The other direction goes back into the tank. The branch back into the tank has a tap on it. Fully open means everything goes back to tank. Fully closed means everything goes to the reel. In between regulates the flow - though I must admit that I often work with it fully closed. Really, I could do with a tap to which it's easier to make finer adjustments.
The main downside of this type of arrangement is that it can run a leisure battery down more quickly when tap is partially open (i.e. pump keeps running water back to tank). I also have a tap at the pole end of the reel.
EDIT: My experience is that, if working this way, those beefy Flojet pumps are far hardier than the Sureflo.