Thanks admin!It has provided me with a great deal of knowledge about aquariums and how to build them

Tyler Ludens wrote:

Brenda Groth wrote:
the ones in the video were made with a liner and either blocks or wood to frame it out..

if you are walking around on the liner you are likely to tear it..sure it isn't squshy mud but it won't last very long being walked on,

Good point. 

A lot of those types of lined pools have sand either loose or in sand bags on top of liner for tear and wear protection.

Check out my cement pond I built in 2012 32 ft wide 52 ft long stair stepped to  11ft deep 2 inches of cement covered chain link and chicken wire. It is for swimming fishing and irrigation. Its on the very highest part of my property and have no problem filling in the rainy season with the run off of my high tunnel. crystal clear water in my video you can see the bottom at 11 ft. Check it out on youtube
https://www.youtube.com/watch?v=9JR-PLUxTME  if this link does not work my channel is william e   the video is called My cement pond

These are beautiful videos by David Pagan Butler that shows how lovely a natural swimming pool can be: