Maranga B O, Kagali R N, Omolo K M and Sagwe P O 2022 Effect of growth substrates on water quality, catfish (Clarias gariepinus) culture and spinach (Spinacia oleracea) propagation under aquaponic system. Livestock Research for Rural Development. Volume 34, Article #82. Retrieved , from http://www.lrrd.org/lrrd34/9/3482mara.html