Block pool with stone wall-how to finish

[Jefina]

I am building a pond out of cinder block that has a solid concrete floor. All the cells will be filled, it’s inground, and has rebar everywhere. I too am considering tile for the whole thing. It’s basicly 9x7 feet and 3 ft deep. I am looking at a 12”x24” porcelain tile that is impervious, less than .5 absorption. Frost resistant etc.

So here is the thing I'm ready to waterproof and seal the block and trying to decide what to do that with. I looked at rubber liners; they seem to be much better than vinyl. Also looked at rubber coatings that can be done in different colors... they’re expensive. One reasons I don’t think I can just go with plaster is that this pool/pond has to be safe for fish. What do folks here think? Can I go with tile?

Also one reason I don’t really want a liner is that I have stone wall that is part of this. Pics below. Ps. Wayfair is a good place to find tile if that’s the way you want to go.

 

[duraleigh]

It will be difficult to keep that structure from leaking at the cold joint where the block meets the floor. A masonry product (like tile) won't do it very well as it will crack. I would suggest a pool liner.

 

[Jefina]

What do you think about using rapid set mortar mix as a skim coat?

 

[duraleigh]

I am not sure I know what "rapid set mortar mix" is, but assuming it is a masonry product, the same issue exists........movement along the floor/wall joint resulting in cracking and then leaking regardless of how thick or what type masonry product you put on it.

 

[SBall]

Truck bed spray-in liner. Look up LineX..they have a version that is suitable for potable water that is used to line/seal water towers.

Protective Coatings | LINE-X

LINE-X has long been known for tough, nearly indestructible spray-on bedliners but what many people don’t know is that because LINE-X is a spray-on protective coating, it can be applied to almost anything.

linex.com