Don’t roll that dice unless you can pay that price

Copper is very well known for being really toxic to all organisms. Too much copper intake can lead to gastrointestinal issues in the short term, kidney and liver problems in the long term. Most effective algaecides for pools are copper based.

The Negative Effects of Copper in Your Drinking Water - https://haguewaterofmd.com/the-negative-effects-of-copper-in-your-drinking-water/

The judicial system has largely ruled polygraph tests as inadmissible since 1998.

Are polygraphs admissible in U.S. courts? A CONCISE Overview - https://axeligence.com/polygraph-admissibility-in-united-states-courts/