I was reading in a forum a question posted by a woman asking if she could just cut the runners off of her strawberry plants in a hanging basket and root them. The answer is no because once in dirt they will die. She didn't want to take her basket down just to root the runners so that got me thinking. The solution I came up with allows the runners to be rooted into rockwool so that they can be planted in aquaponics, hydroponics, or soil. What I did was soak the rockwool in a very weak nutrient solution, put the rockwool into a 2" x 3" ziplock baggie, and then secure the rockwool to the plant node with a paperclip. After 20 days there will be a healthy root system so that you can cut the runner off the mother plant and grow it where ever you want. I made the video below to show how to do it step by step. I call it the SleestaksRule method.
UPDATE SINCE I MADE THE VIDEO:
A few days after I posted the video, somebody in the hydroponic forum on Reddit suggested wrapping the baggie with aluminum foil to prevent algae from forming and keep the roots from being exposed to light. As you can see in the photo above, that's exactly what I did. Hope this helps you all!