I wouldn't worry about the harmful chemical composition of construction / demolition of waste concrete when it is added to the pond. Air pollution striped out of the air during rains probably adds more contaminants to the pond compared to discarded concrete. If waste concrete is so bad why do municipalities add concrete from demolition projects to the drinking water supply reservoirs as shoreline stabilization?
As the pond is managed and if one is concerned about contaminants in the pond remember that the algaecide copper sulfate is heavy metal based product and the copper byproduct is stable in the environment and never rots up or goes away. The more copper based product that is added to the pond the more the copper residue that builds up in the sediments. The copper can under certain bottom sediment chemical conditions be dissolved into the overlying water layer. This IMO does more harm to the pond ecosystem compared to adding construction waste concrete pieces to the pond.
Last edited by Bill Cody; 02/12/25 10:16 AM.
