Need brand new pond constrution help!

[karlseith]

Is it ok to use concrete for the construction of the pond and not line it with anything? If so, is there certain types of concrete I should stay away from or types I should use?? I'm putting a small 100g pond in an old filled in well and the edges are jagged rock that I'm going to smooth out with concrete. I'm on a very tight budget and would like to avoid using those expensive rubber liners.

Thanks!
Karl

 

[krap101]

well.. i dont think there are any downsides besides it hardening your water and raising your ph. also the ground shifts every now and then and it'll crack.

 

[karlseith]

My main concern was the pH issue, but if it wont effect it enough to cause a major concern than that calms my fears. I can adjust the pH regularly. Thanks for the reply.

Karl

 

[ReefNooB]

well depending on what you are goig to put in your pond it probably wont be that important. If you are just doing Koi and Goldfish, they can handle such a wide range of PH u probably wont have any issues. I know that you could use fiberglass resin on water proof your concrete but i dont know if that would be any cheaper than Liner. You might even look into basement sealers such as DryLock, but i dont know what it is made of and may not be fish safe.