Polaris floats are absolutely brilliant with bite indication at the float showing before any registration at the rod tip. No worries about plumbing the depth of swims either.

I tend to fish the polaris as a running set up and I put the float on the line followed by either a bomb or feeder attached to a quick change running clip and then slide a buffer bead on next to stop the bomb/feeder followed by a swivel tied using a palomar knot. The bead is then slid over the top eye of the swivel. A quick change clip is then attached to the bottom eye of the swivel and a hooklink can be attached to the clip with a piece of silicone tube placed over the clip to prevent tangles. You need to experiment with the bomb / feeder to guage the minimum amount of weight needed to cock the float correctly. When fish are feeding confidently it doesnt seem to matter how much weight you use. With the rod pointing at the float and a fairly tight line cocking the float this often has a bolt effect with fish hooking themselves so you need to make sure you are not too far away from your rod or you could lose it.

A great and much ignored method that is in my opinion much better and close to medium range than a alarm set up during short sessions.