Fixing a crack

[Tombstone]

Hi all
This spring when the night time water temp is in the 60s I'm going to drop my waterline about 5 feet and repair most of a crack that I think is losing water. I'll show step by step of the repair. Any input is welcome

 

[sissy]

What is the crack in ,a liner or preformed pond or stock tank

 

[Lisak1]

Drop it five feet? Just how deep IS your pond? (she asks jealously!)

 

[Joejoe80]

5 feet it’s not a pond it’s a damn lake

 

[Tombstone]

What is the crack in ,a liner or preformed pond or stock tank

In a cement 24,000 gallon lined pond. The crack is about 10 feet long and a 1/8 to 1/4 inch wide.

 

[Tombstone]

Drop it five feet? Just how deep IS your pond? (she asks jealously!)

Only about 7 feet.

 

[Tombstone]

 

[Tombstone]

View attachment 125941

Water looks greener than it is. A pic of the crack.

 

[addy1]

When I had a pool in AZ I had a crack, used something, many years ago, that repaired a crack under the water. Maybe you could do that.
No clue on what I used. It worked.

 

[Joejoe80]

This looks like a commercial for flexseal. Flexseal for all your home-improvement needs is it cracked does it leak just flexseal it

 

[Tombstone]

This looks like a commercial for flexseal. Flexseal for all your home-improvement needs is it cracked does it leak just flexseal it

I'm thinking on some kind of hydraulic cement. Interesting enough I fixed a hole the size of a half dollar in a swamp cooler with Flexseal. And it's still holding.

 

[GBBUDD]

Hydrolic would be the only masonry product i would look at, but i would lean toward a two part epoxy cut the crack open clean with muratic acid to etch the fresh cut and apply the epoxy

 

[Tombstone]

Hydrolic would be the only masonry product i would look at, but i would lean toward a two part epoxy cut the crack open clean with muratic acid to etch the fresh cut and apply the epoxy

Yep I looked at those, kinda pricey and not planning on taking any fish/frogs/turtles out of pond. Any major repairs, Fish and Game has to be notified. I may use something that's injected in the crack.

 

[Joejoe80]

Yep I looked at those, kinda pricey and not planning on taking any fish/frogs/turtles out of pond. Any major repairs, Fish and Game has to be notified. I may use something that's injected in the crack.

woh wildlife fish and game?

 

[zeuspaul]

I don't see the lining? I would clean about six inches of the surface adjacent to the crack. A wire brush might work well for this. Clean inside the crack the best you can. Then apply Rapid Set Mortar Mix (available at Home Depot). Apply about 1/2 inch thick over the crack and then feather it in with a trowel or drywall spatula . Rapid Set is strong and doesn't shrink like Portland cement. I used it to seal the joints in a 10 ft deep cement block tank I made about ten years ago and it is still holding water.