Forming a theory - Baquacil is proprietary, and I'm not sure if this patent is saying it contains copper. The date of the patent application I linked is dated 1996. IIRC, the A's used Baquacil in their pool, instead of chlorine. Could this explain the luminol glow?
Snipped from Wiki:
Drawbacks
Luminol has some drawbacks that may limit its use in a crime scene investigation:
Luminol chemiluminescence can also be triggered by
copper or copper-containing alloys, horseradish, and certain bleaches[citation needed]; and, as a result, if a crime scene is thoroughly cleaned with a bleach solution[specify], residual bleach will cause the entire crime scene to produce the typical blue glow, effectively camouflaging any organic evidence, such as blood.
Luminol will also detect the small amounts of blood present in urine and it can be distorted if animal blood is present in the room that is being tested.
Luminol reacts with fecal matter, causing the same glow as if it were blood.
Luminol's presence may prevent other tests from being performed on a piece of evidence. However, it has been shown that DNA can be successfully extracted from samples treated with luminol reagent.[4] [ame]http://en.wikipedia.org/wiki/Luminol[/ame]
Snipped from freepatentsonline:
The invention discloses a composition and method for the enhancement of polyguanide based water sanitizing systems and for conversion of such systems to alternative water sanitizing systems if desired. The method includes the addition of an enhancing or conversion agent selected from the group consisting of a halogen salt, a Bromohydantoin and a chlorobromohydantoin in an amount to provide a concentration of approximately from 1 to 50 parts per million. Sodium borate and/or polyphosphate may also be added to the system to improve the effectiveness of the enhancing agent. The system may be converted to an alternative water sanitizing system by the addition of a sanitizing agent selected from the group consisting of chlorine,
copper, silver, quaternary ammonium compounds, and polyquaternary ammonium compounds, which may be released into the water at a rate of 0.01 to 1 ounces per hour per 10,000 gallons of water for a period until conversion is complete.
Edit to add: copper is a known anti-bacterial
Edit to to add: link to freepatentonline
http://www.freepatentsonline.com/5527506.html
sorry about that, I guess its getting late