I'm shocking my pool for mustard algae and the only place in my pool where some might be lurking is behind my light. I have a 500W light fixture connected to a dimmer. Is it safe to get in the pool and unscrew it to see if there is any algae behind the light fixture that needs to be scrubbed out? I've checked/cleaned any other possible spots or devices that it could be hiding out at.
I've never done anything with the light before so really not sure what to expect.