July 23 (SeeNews) - Croatia's Optima Telekom [ZSE:OPTE-R-A] said on Thursday it turned to a consolidated net loss of 1.7 million kuna ($261,5003/226,000 euro) in the first half of 2020, compared to a net profit of 5 million kuna a year earlier, due to higher financial costs, amortisation and significant capital investments.