Swimming pool(?) cracks

NickDanger

2,500+ Posts
The parents have a place in the hill country. It has a spring that fills up a cistern for drinking water (very good btw) and when the cistern is full it overflows into what we call the "cement pond" swimming pool. It is an oval about 75' x 150' and about 7.5' deep in the center. It has no walls to speak of. It slopes down from 1" to the center at a fairly gradual pitch. It is hand finished concrete. No Plaster. No filtration. Too many gold fish IMO. Reinforced? almost certainly, but I have no idea how. It probably has almost no soil underneath it. Limestone. When it fills up, it overflows into the woods.

Once a year we drain it, muck it out and power wash it and refill it in what I call hell weekend. There are a fair number of cracks that have been filled in with various things over the years like silicone, etc and it always ends up getting pressure washed out or just deteriorates for one reason or another. I have pointed out that losing water really isn't a concern and the leaks are not causing subsoil problems (since there isn't any in my best guess) and they really aren't a cosmetic problem. I'd rather get rid of the stupid goldfish who won't admit they are shitting in the water. I know they are lying as goldfish are known liars. And shitters.

Anyway, pops always tries some half-assed attempt at sealing these cracks. The attempts are never truly water tight in my opinion. This weekend he will do the same and he is taking his advice from a couple of exchange students from Mexico who are in the U.S. studying the inner workings of the Western Union system for wring funds to foreign countries. They want to use the same stuff they use to set fence posts.

Any suggestions on something else to use that might be unobtrusive and maybe even effective and can get inundated within a day (the cattle get watered out of the pond so it has to get refilled with water pumped out of the river)?

I'd especially like to hear from L-H Pools, our resident pool expert if he has the time, but this may reallly not be a swimming pool suggestion. I'd really like to avoid putting a big black bead of something in them if it could be avoided.
 
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Nick, my buddy and I used the above product when building a pond in his backyard. We dug a hole about 4 feet wide, 6 feet long, and three feet deep. We lined the hole with broken concrete on the bottom and stacked on the sides, using mortor to grout the gaps. We then did the thoroseal over the top. It worked beautifully. The only caveat: It leaches a little cement product, and the water was cloudy for a while until the filter took care of it. Probably not too fish friendly right away..However, he now has koi in the pond and it's still doing great to this day, several years later.
 
Not sure if this will answer you question. With swimming pool cracks here is what I do. We saw cut the crack open so we can injected it with a construction grad silicone. We ge the silicone down in the crack with a little void left at the top of it. After the silicone has set up we go over the top of it with water stop. It is a hydrolic cement, you can get both of these products at Home Depot.
If you all have any questions feel free to PM me.
 

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