questions: asking about the method of de toxofication of pond water. 
 answers: advised to put the cut pieces of banana plant into the pond.apply quick lime 3-4 kg for 1/2 bigh awater areas.do not throw the feeds.use plustic onion bags to suppy feeds keeping 6 inches submerged in to water by tieying with a bamboo stick.disturb the water level by bitting with a bamboo or by swimming.