Bleach in Fibreglass Water Tank

[reiner]

My watertanks in the boat are part of the hull and made from fibreglass. Is it ok to clean the tanks with Bleach? I read somewhere you mix 240l water with 1.2l bleach and leave it for 8 to 12 hrs.
I did that today and now I'm wondering if the bleach could harm the fibreglass.
Any thoughts on that ?

Cheers
Reiner

[GrowleyMonster]

No problem especially at that dilution. Just ventilate the tank before filling.