A garden tank sprayer with water and bleach mix will clean the rocks.
I would use swimming pool slow dissolving tablets in a floating
dispenser after that. Protect your eyes and wear clothes you can throw
away when spraying the bleach mixture. If you have sensitive skin
cover up and wear gloves.
I don't think you can use algaecide because it foams like soap.
I would check with a local pool or spa supply they might have a non
chlorine product that will not have the smell.
"Rob" wrote in message
om...
I have read that I can use bleach in an outdoor fountain (no plants
or
fish) to remove algae. Does anyone know the amount of bleach?
Also,
I have a dog and want it to be safe for him as well as wildlife.

Finally, would I just add the bleach and wait for the tons of algae
to
go away or do I need to clean it out first. Cleaning first is a
little difficult because the fountain is a natural one we made with
lots of rocks (as opposed to the concrete store-bought type).

Thanks.