posted a month or so ago asking how i could re-whiten the white gravel in my garden. followed your advice and diluted some domestos (sodium hypochlorite) in a watering can and sprinkled it over the gravel but alas gravels still dirty and green. any more ideas? do i need to try a stronger solution?
Try this product, it will remove green algae from pebbles, paving, wood etc and keep them clear for 3-4 months. Wont remove dirt tho. We use it and find it very effective.