fiberglass pool cracks

[Darcy]

We have a 10 year old fiberglass pool. This is the first year I have noticed cracks -- I see about 3 hairline cracks where the floor and wall meet. Any ideas on why, or what to do about them?

16,000 IG fiberglass

FC:5
TC:5
CYA:50
CH:200
pH:7.5
TA:120

 

[Bama Rambler]

Chances are they're cosmetic but I'd have a fiberglass pool guy look at them. They can repair them if they're more than that.

 

[AquaDoctorLLC]

Hopefully they aren't being caused from a leak. I have a fiberglass pool that the builder piped with flex hose and didn't get a good glue. Also over time the flex hose will become brittle and crack. Pool started losing water slowly and he chalked it up to evaporation. It wasn't. It was washing out the sandy soil and caused the lip edge 18" from the top of his pool to have a void and his pool cracked in two places.

Good luck with it & let us know what you find out.