Cooling your laser is one of the most important systems in your machine. Without proper cooling your laser tube will die quickly.
Please note, the articles in here is based on my long experience in custom computer cooling, which is similar to the cooling system we use on theese machines.
There is other words about what to use as coolant and how to take care of your cooling loop, you have to read and evaluate yourself what seems logic.
The articles i write here is how i do it and what has been working good for me for 10-15 years.