sera Vipan Nature Tropical Flakes Staple food with 4% insect meal and prebiotic effect sera Vipan Nature is the staple food consisting of floating flakes without dyes and preservatives for all ornamental fish eating at the water surface. It contains insect meal as a high quality protein source which is also resource saving. The balanced composition with natural ingredients and prebiotics allows for a diet very close to nature that supports healthy growth and strong development. The flakes keep their shape for a long time and do not cloud the water.