I am about to cast a hollow concrete plinth on which a fountain will sit. The outer mould will be a galvanised steel ring 10 inches high by 24 inches diameter the inner mould being a plastic bucket, the space within the plinth will house a pump to drive the fountain. . I don't intend to keep fish or plants in the pool so I'm not bothered about the toxicity of the water. The plinth will, when cured, be totally immersed in water, and I wondered if there was a special mix or additive I should use to protect it from long term immersion. What does the team think? Regards Don
- posted
16 years ago