annual services contract for day to day routine operation and maintenance of fresh and marine water aquarium tanks and sharkpool including aquascaping work along with day to day routine operation and maintenance work of central life support system for fresh and marine water section and sharkpool at jagdishchandra bose municipal aquarium, pal-adajan, surat for a period of 24 month. (initial for a period of one year, which may further extended to 2nd year subject to the satisfactory completion of one year .