Hi everyone, A year and a half ago I had my three goldfish breed in an aquarium. We saved 30 eggs thinking we'd be lucky to raise 1 or 2 to keep in the aquarium but we ended up with 27 raised to a couple of inches. We couldn't keep them all so placed them in an indoor pond in the local council buildings. However we found out recently that they're pumping in untreated tap water in order to top it up and my babies have been dying off. I have since taken all of my fish back and have them in tanks dotted about my flat so I'd like to build a pond to keep them myself. We've got as far as marking the place but I think I'll need to get more advice before we continue also we need a pickaxe to break up the stoney ground.