How big would a fish pond be if the liner is 15x15ft and 18 inches adjectives?
Answers: Well, you need to evacuate some of the liner at ground level to form a coping strip to prevent your pond from leak out the top - at least 6", preferably more close to 12". Then, you're going to have to help yourself to into account the sides, and give somebody a lift another 18-24" off adjectives the way around.
So, 1 foot of coping, plus 2 foot for your sides, is 3 feet sour your 15 foot liner, all the mode around. That leaves your bottom dimensions close to 12'x12', which would give you a pond volume of going on for 1,340-1,350 gallons.
Hope this helps.
About 12 x 12, conceivably a little smaller quantity.
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