We put the nonagon up recently and, when we came to put the liner on we found the liner too big and a side too many – we’d accidentally forgotten a panel and made an octagon. As the panels went together just as well with one missing, we tried it with one extra. Ten sides worked too and it gave a pool that is catching on. It is wider than our ‘workhorse’ pool the nonagon but not any deeper. As the first church to try it and buy it was in Croydon, the name stuck. It is a cost-effective way to get a large baptistry tank (nearly 7′ across) that can be stored easily and doesn’t required the larger steps of our deeper baptistry (The Apostle).