I got this tub at Tractor Supply. It's the perfect size for an SE or SE/30. I filled a windshield washer fluid container with water and gravel so it displaces water and weighs down the Mac and then jammed that inside the Mac body and put the front bezel on. The Mac then went upside down into the container and I filled it with water and liquid peroxide hair bleach #40. The liquid juuust covers the feet. Perfect fit. Now I'm just waiting for the results. The container is clear but it's late so I'm not sure it'll get much sunshine.