Can pebble tech be used in a pond?

I am not familiar with pebble tech so I looked it up on their web page. If you were using cement I would caution you about the lye leaching into the water and the consequent change in ph. To take that concept forward, I would question if there is any potential for the chemistry in the pebble process to end up changing the chemistry of the water. Of course that would not make a difference in a swimming pool but would certainly be an issue if you intend to put fish in your pond.

My second thought is that a vital part of the Biology of your pond will the the fine fuzzy hair-like algae that will eventually grow on all the surfaces of your pond. If you go to great expense to have a pretty surface, you will certainly be unhappy when that algae appears.

But wait! That algae serves a valuable service in keeping your pond water clear. 1) It provides surface area for your beneficial bacteria to grow on. (it is these bacteria that compete with the algae for nutrients) 2) it consumes the nutrients that, if not consumed, will turn into 'pea soup' algae.

This may not be the yes/no answer you wanted, but it will give you some questions to ask and some understanding of your pond biology. (www.rosepond.com)