I agree with bowtine. It's alot of work for not necessarily alot of good results. Besides, one well placed hoof will puncture the plastic. Perhaps a smaller livestock tank would be better. Or even a 55 gallon poly drum cut in half. I can get the 55 gallon drums around here for $5. You can cut it in half horizontally and make 2 great big "buckets" or you can cut in half vertically and make 2 average size troughs. No deer is going to poke a hole in poly with a hoof, and I'm sure the kiddie pools cost more than $5.