I successfully fermented a must of lemonade, dextrose and honey with EC 1118. It is good but very dry. I racked it into a secondary and added more lemonade concentrate for sweetness. My problem is I left the concentrate cold and stopped fermentation altogether. 

I wanted it to be carbonated but not sure how to make that happen at this point. Also would like to know if it is ok to condition in the secondary or should I just bottle it. 

Thanks for any advice.