motorized ball valve

I need your opinion on using a motorized ball valve on a return line to achieve the following. My 112-gallon display is connected to a 25-gallon sump by 1" flexible tubing. I do water changes through a sump by draining about 10% of the display volume through a return line. The position of the...

EDIT: Remaining items moved to this thread I'm willing to do local trades for purple or blue acropora. Teal staghorn doesn't count lol :p Everything is in good working order (unless otherwise noted) Paypal or Venmo. Thanks. PICKUP: West Hollywood 90046 (right next to plumbers park) 250$...