Indo Gulf Fertilisers today reported a 19% increase in net profit at Rs 21.33 crore for the third quarter ended December 31, 2005 when compared with Rs 17.85 crore in Q3FY05.According to a release issued by the company to the BSE today, total income declined to Rs 174.16 crore in Q3FY06 from Rs 178.39 crore in Q3FY05.