Growing fish and plants using aquaponic, hydroponic and mixed technologies Aleksandr Kovrigin, Grigorii Pokhodnya, Yuriy Breslavets, Alexander Breslavets and Valerya Zhabinskaya E3S Web Conf., 282 (2021) 03028 Published online: 05 July 2021 DOI: 10.1051/e3sconf/202128203028