Hi,

I'm new here, found this site while researching an issue with my Fiberstar system. Looking for some advice if you have any optic or lens type of knowledge.

I have a 10 year old Fiberstar 6008 fiber optic lighting system in my swimming pool. The system uses a metal halide bulb, which sits behind what's called a hot mirror. On the other side of the hot mirror are the fiber lines.

I'm no scientist, but from what I deduce the purpose of this hot mirror is to filter out the infrared emitted from the metal halide bulb, so the end of the fiber lines don't melt.

The hot mirror consists of 3 pieces of 1" square glass stacked together. The top and bottom piece appear to be regular glass, as when I clean them with Windex they come out clear.

Here's my dilemma. I'm in the Northeast, and I opened up the pool last weekend and then went through the lighting system to clean it. The middle piece of glass in this hot mirror platter seems to be different from the other two pieces it sits between. The part is supposed to be clear. But when I hit this piece with some Windex, it doesn't t clean. It has some sort of mineral deposit built up on it, and it's no longer clear. It looks almost like frosted glass now.

I checked with the manufacturer and I can't just get the little piece of glass, I need to buy the entire assembly, for $150 +/-. Not the end of the world, but was wondering if there was something I could do to clean this little bugger- maybe with some muriatic acid - to remove whatever is built up upon it. And if this piece of glass was covered with a film to add optic characteristics, how important would that film be to the overall purpose of this part?

Thanks,
Phil