Hello! I constructed a small (1/3 acre, 11' deep) pond in Kansas and it leaks. It is a pit pond (no dam). I was advised to till in salt or soda ash and then compact. I've researched this method and it seems to be a common solution in my area. Alternatively (but more costly) there is a local source of red clay (90%) that I could have brought in to create a 1' thick liner. The clay would be installed in 6" lifts and compacted after each with the tires of a 50K lb high loader.

My question is this: Should I do both? I really dont want it to leak again, but I'm not sure if the salt tilling + compaction + 1' clay liner would be overkill?

Thanks!