Condenser cooling temp

[Wolfman]

I have searched for quite some time about cooling temp for my condenser and have not found much info. Sorry if I just missed it. My question is about the cooling temperature of the water I recirculate through my condenser. Currently I use quite a few homemade ice blocks to keep the water very cold. One one run I ran out of ice and the cooling water slightly heated up. The hotter water did affect the output performance. So what temperature should I strive for in cooling temperature water? I don't know if in everything I have read if cooling is not that important but it did affect the longevity of the run. If anyone has any input on proper cooling temp to aim for it would be greatly appreciated.