As a last resort, his carers tried out a gadget called the Endless Pool which churns up his pool water like a jacuzzi.
And he loves it! The gadget makes swimming like a game for Gus. He's much more playful - something he never was before.
He even impresses children with tricks now, like swimming with a bucket on his head!
It's a happy ending for Gus, whose life is a bit more "bearable" now!