Collection of  Bulletin of Science, National Technical University of Ukraine ,  Kiev Polytechnic Institute . A series of  Chemical Engineering, ecology and conservation of resources , Kiev, 2009 Bulgakov B., Bulgakov A., Prymak V., Romantsov V., Galitsin V., Gurvitsh G. The article is dedicated to the actual problem of application of the fish protection devices which must be in accordance to the modern requirements of ecological safety, must have high fish protection effect and reliability.