No, you should not put chlorine or bleach in a pondless waterfall or fountainscape. While chlorine may kill algae temporarily, it can cause significant damage to the components of the water feature and kill any wildlife that depend on the pondless waterfall or fountainscape as a water source.
Harm to the Wildlife:
Chlorine and bleach will disrupt the natural balance of the ecosystem, killing beneficial bacteria, pollinators, and other wildlife, such as frogs and dragonflies, which are important to the biodiversity of the area.
Damage to the Liner:
Both chlorine and bleach can degrade the rubber liner over time, causing it to break down. You may notice black residue on your hands when touching the liner after exposure to these chemicals, indicating the deterioration of the material.
Damage to the Pump and Fittings:
Chlorine can corrode the seals inside the pump, as well as any metal fittings, causing them to wear out faster and potentially leading to expensive repairs.
Instead of using harsh chemicals like chlorine or bleach, it's recommended to use water treatment products specifically designed for pondless waterfalls and fountainscapes. These products work in harmony with the natural ecosystem and help control algae without damaging the system or the environment.