For anything that size, you really need to be looking at tray (or dish) washing.
Kodak made an automatic tray siphon. This was great as it attaches to a tap for water inlet, and had a siphon for water outlet. The major downside is that you will need to elevate your tray in the sink by about the depth of a house brick. Four house bricks was the go, cheap, stable and they never absorbed water.
Unfortunately the Kodak automatic tray siphon, will go through water like you wouldn't believe.
Maris I had one of the early Paterson units with the clear exterior, a myriad of hairline cracks appeared over some years until it eventually started to seep water. At this point fearing it may crack, it was removed. I believe Paterson took their dimensions from the outside of the tank, not the inside as one would expect.