Question: askng about bubble formation in fiush pond and removal of algal growth
Answer: remove the algae by using either mosqueto net cloth or muslin cloth
next use bundle of dry paddy straw and let it float on the water surface for 7 days and clean and dry in order to use for another 7 days 
next apply lime @ 10 klg per bigha
apply oxymore tablet @ 20 to 25 for 1 time and splash the water surface using bamboo