How to plumb in Circ. pump to exchange spa water with pool water
We have an in-ground spa and pool that are separated but share the same pump/filter/heater. When we use the spa, we switch the valves so the spa is heated/pumped then when done, switch the valves back so during the day the pool gets filtered.
I am trying to figure out how to plumb in a little circulation pump like a Tiny Might so during the day along with the normal filtering of the pool, the spas water will be exchanged with the pool water. Right now, since the spa is always isolated from the pool, the chemicals/chlorine build up and over time begins to irritate skin. I know if I change out the spa water manually with the pool, the water feels nice again so I was hoping to figure out automatic way to do this exchange.
Thanks for your help!