The terracotta pipes can be found at builders merchants but they don't come cheap , since I've had a bare bottom tank I've had to swap my terracotta pipes for plastic ones incase it rolls and smashes tank , plastic pipes are fine to use , rain down pipes , guttering and soil pipes depending on size etc , make sure once you've cut them you sand/file the cut edges smooth , so solve the rolling pipe problem with bare bottom tank I siliconed a series of them together , you can make pretty cool pyraminds from them with various lengths , plus if you've got a black back on tank the black pipes are hidden more than terracotta
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