[Eugeneg]

Quote: Originally Posted by Upscale . I spray it on geo -textile fabric, on styrofoam, on styrofoam "blocks" that are filled with concrete, on gunite,concrete, fiberglass and maybe I'll find other surfaces to apply it to. It truely is remarkable and will probably last longer than me! Unless you have a huge pond most applicators will charge around $12 per square ft. Skip.

For a koi pond I do not think that it is a good idea the ground temperature under a pond is great for stabelizing water temperatures . So if you do spray it should be sides onley , otherwise the pond will gain in temperture during the summer and be colder during the winter . Either can kill fish
Regards
Eugene