Rainwater storage tank: video update

Here's a short video to show the status of a masonry water storage tank prototype I've been working on.  The tank was made from manufactured concrete block which I designed and had produced on a standard concrete block machine.   This will serve as a "plunging tank" to cool off after taking the sauna.  The same idea will be used to collect potable drinking water.

To see the tank completed, please look here.