Good Quality Distilled Water???

Would water available through some aquarium shops be suitable? The shop where I buy my fish supplies has a large "reverse osmosis" filter system in the store.

I think the idea that you need distilled water is bunk. It is a result of the audiophile obsession to take everything to the extreme.

What's in your tap water, rocks, grains of sand? No, various chemicals in the parts per million range. I seriously doubt that a few molecules of chlorine or whatever left behind on the record will affect LP playback. Whatever detergents, etc. that are added to the distilled water to make a cleaning solution far overshadow those in the tap water.

Well, Herman, you are entitled to your opinion. I suspect you are speaking based on what you think you know and not on what you really do know. What do you think leaves water spots on your car after you wash it? The rest of us know what we hear after using RRL products. There is no detergent in RRL products.

I worked professionally more than 15 years in the potable water industry as a water treatment specialist and I can assure you that there is far more mineral content in your tap water than you think.

Herman, Distilled water does not have minerals in it. That's why you're supposed to use distilled water in many applications such as car batteries because the minerals will ruin the battery.
Distilled water is captured steam. Nothing is added to it. That's the point.

Herman,
I'm glad your tap water is so pure. Mine isn't. Washing LP's with my tap water, even filtered, leaves deposits that are both audible and visible. RRL fluids don't do that.

You posited a general theory that, "Whatever detergents, etc. that are added to the distilled water to make a cleaning solution far overshadow those in the tap water."

I'm afraid this theory does not match my real world experience. Is my experience just "bunk"? May I ship you some of my not-very-pure tap water to help you cool off? ;-)