The&nbsp;reopening of Lake Sorell to anglers has been pushed back as the carp eradication program appears close to its ultimate success. The Inland Fisheries Service had hoped for a limited reopening of the Central Highlands lake in 2019. "Because the carp eradication activities are ongoing, we have decided that Lake Sorell will remain closed below its high water mark to the public in support of the program until at least early 2020,"&nbsp;the IFS said. It said it estimated there were now fewer than 20 of the introduced pest fish left in the lake, and eradication was likely within 18 months. It said there had been great progress in the last year. "Winter 2018 created good inflows, flooding the wetlands in Lake Sorell,"&nbsp;it said. "These high and rising levels provided perfect spawning cues for carp as the temperature increased through late spring and early summer 2018. "Even with the ideal conditions, the hard work of the carp management team seems to have worked." It said recent surveys did not find juvenile carp and only 39 adults were caught in the 2018-19 season. While you're with us, did you know that you can now sign up to receive breaking news updates and daily headlines direct to your inbox? Sign up here.