Gelcoat crack in fiberglass above water

[johnssc1]

This has been here for at least the 10 years I have owned the pool, so I suspect it was original subsidence. If I poke at it, it seems shallow, so I'm going on the assumption it's gelcoat only

Since I'm going to close up soon, I would like to take care of it with some polyester resin.

What is the process for cleaning this first? It looks like it's been culturing some funky algae

 

[ajw22]

What is the process for cleaning this first? It looks like it's been culturing some funky algae

I would scrub the crack with a chlorine solution and a tooth brush, soak the crack with chlorine solution, rinse and repeat a few times.

You know the manufacturer of the pool? You may want to contact them and see what they recommend.

@Texas Splash

 

[Killer95Stang]

I would start watching youtube videos of marine gel coat repairs, since the fix will be similar to fixing a fiberglass boat.

 

[cowboycasey]

Lots of videos out there to fix that, should be easy enough