100 Gallon Stock Tank Lids/Covers?

[Pout]

Does andybody know of any lids or covers for a 100 Gallon Stock tank?

 

[Toby_H]

I made a hinged plywood lid for my 300 gal rubbermaid stocktank and painted it with Killz mildew resistant paint... I didn't use it often, but made it and it worked...