Seahorse Aquariums managing director Kealan Doyle: ‘It was really tough as I slept on the floor of this industrial unit every weeknight for two years, while my wife and daughter were in Connemara.’ Photograph: Laura Hutton/The Irish Times

There are not many shops in the country that refuse a sale, but at Seahorse Aquariums “we refuse more fish than we sell, as we need to see their tank (...)