I have an outdoor concrete pond/fountain and I am planing on putting a mosaic bottom and edges, so the water looks crystal clear, Is this harmful for fishes? Thank you
Watcher74 said:Mosiac? Is that a substance? Or a pattern?
RTR said:A crystal clear goldfish pond is a contradiction in terms. Perhaps rethink the concept? A shallow ornamental pool with all the fountains and filters and chemicals and algicides to hold that look, or a pond with fish - two entirely different concepts.