I would say it's a safe bet that chlorinated water would have a negative effect on watch resin over time. It would probably lead to the plastic becoming brittle. My family had a pool and we had to replace rubber gaskets and seals inside the pump over the years. However, I believe this would take a long time to happen to a watch - hundreds if not thousands of exposures to the water. I'm sure washing it off after exiting the pool would help as well.

 

And I know this sounds odd - but I would actually be proud to wear a G-Shock or other watch so much that it fell apart :-d I love my collection and I certainly try to keep them in good condition, but there's something to be said for a well-worn watch that's served its purpose, especially a G.

 

Well, I can't say I swim every day - but have worn my GW-700 as I swim at least once a week or more for post 5 years. I haven't done anything more than rinse it off afterwards in the shower, and all there is to show for all the chlorine are a few faded areas on the black strap and some paint on the bezel lettering. I imagine the quality resin straps and cases of a G, and ProTrek, are much more resilient to chlorine than a lycra swim suit. Come to think of it, I have probably gone through 2 suits over the 5 years with the watch.

Score: watch 2, suits 0

 

Chlorine is a chemical and can discolor the case and band on your Casio G-Shock. I don't know whether or not you could scrub off the chlorine and rejuvenate the bezel, band or case on a G-Shock to its normal black color after the watch is put thru a very long exposure to chlorine?
I always shower with my G-Shocks on and I've noticed that the resin case and resin band turn whitish after many multiple showers and contact with soap. I just scrubbed down my DW6600-1V with a mild liquid body wash soap. and a toothbrush and 100% of the white film that was on the resin case and band fully came off.
I don't know whether or not chlorine would come off when scrubbed down with a mild liquid soap like body wash.

 

Basic rule I follow is that all watches exposed to chlorinated or salt water must be thoroughly rinsed in fresh water after each outing. Hey, G's are tough but a little basic care never hurts.;-)

 

right... but i saw my was not affected a lot with contact of clorine...;-)

 

was thinking about this too. thanks for all your inputs! and thanks to Masterclass for popping the question. :-!

 

I cannot state how newer Gs will react but I can tell you this, I wore a old (new then) 5600 while I was working at the oceanfront (Va Beach) as a lifeguard of hotel pool for a summer. I swam in the pool repeatedly (literally dozens of times) throughout the day and also in the ocean. Keep in mind that I stayed out in the sun the entire day with no cover (except the pump room to add chlorine blocks). I never noticed any change in texture or color due to this use.
I also had a 6600 that I used to dive with and did a lot of swimming in pools during that same period. Again, never noticed any change in color or texture.
Unless the chlorine is too highly concentrated and not good for swimming I'd say you are good to go swimming in the pool with your G on.
Your skin will have a problem before the G will!!!:-!

 

I have worn mine in pools and oceans for years, and never had a problem. If I take them in with me, I just make sure to wear them in the shower afterwards. I buy a lot of used watches, and the primary thing that builds up on them is soap residue.