questions: asking about gas bubble disease in fish pond 
 answers: give bath treatment to the infected fish with kmno4 (potash) at the conc. of 1 gm/ 100lit. of water for 1 hr. (or) give bath treatment to the infected fish with the conc. of 10 gm/ lit. of water for 20-30 minutes. (or) give bath treatment to the infected fish with copper sulphate (cuso4) at the conc. of 5 gm/ 10 lit. of water for 15-20 minutes