I used a Sterlite Sweater sized plastic box.... less than one gallon of Evapo.... for this pan, and it was a tight fit in the box.....
Now, the next few pieces I will post, maybe later today, I had to employ additional tactics to use one gallon of Evaporust and make it cover the pieces....
(Think Ziploc freezer bags filled with Water and sealed tight, to displace the solution, and raise the level in the box......).
(Had to make a trip to Tractor Supply last night, though, for more Evapo... 8-) )