Thanks for the help. 27deg in Christchurch today and tank at 16deg Have 3 happy Koura, sorting out their new digs they have had a wee feed on some cucumber but haven't eaten much really. Any help on the best temp and how often I should be feeding the little fellas would be good. Ended up with a Hailea HC 500A chiller, it only pumps out the water 0.4 deg lower than the tank temp is this normal or should it be higher? Thanks Again Steve