This season, after some pool replastering and a long acid bath to fix the spotty job they did, I have noticed that there is water within the fixture ~2/3 way up. It's works just fine and I know that it has been on at least 30 min or longer at a time without any obvious sequela, before I noticed it.
Is this a problem if I use it? It is at least 6 years old and maybe up to 20 years.
Is this a problem if I use it? It is at least 6 years old and maybe up to 20 years.