How many and what size radiators did you hookup and on what wattage of laser ?
I have 1x240, 1x80 radiators attached. Also some pad to mount a peltier element and cool it with Corsair H80 but that is not yet operational and maybe never will due to the fact that cooling with radiators and convection seems to be enough. I got about 6L of water in a plastic tank with the pump so plenty of additional heat capacity. The laser I have is std. K40 with 40W. So I guess it is less than that. I want to mount 2x120 Vents and 1x80 Vent for the radiators to get some more performance if needed later.
Here is a picture of the setup:
https://www.facebook.com/viciousviper79/photos/a.764785466886693.1073741828.756018644430042/1254885724543329/?type=3&theater