"Since I'm getting a lot of the same questions, I'll answer them here. - The water is just clear resin. - The fish are made from polymer clay. - No, the animals are not real. - This was done over the course for three days. - As the koi ponds are one of my popular items, I will not be making a tutorial or explaining how to make parts of them. Sorry!"
The materials needed for clear casting are water clear casting resin, catalyst (hardener), measuring syringe, plastic mixing cups and a mould. Opaque or translucent pigments can be used to colour the resin if desired. Wet and dry paper, and polishing compound, will also be useful to finish off the casting. Finished castings can be filed or sawn, A protective mask should worn to shield the eyes and mouth.
Koi pond in an altoids tin DIY 1) cover the outside in your choice of polymer clay and bake it 2)put glue (i used elmers glue) on the bottom and cover with sand. 3.)add in decorations like the plant ( i made this with polymer clay along with the koi, pebbles and lily pads) using a strong craft glue that dries clear. 4.) Lay out the pebbles and koi and carefully pour clear resin over it 5.) Wait untill its about halfway done drying and add lilly pads. Done!