Besides, does water cooling loop order matter?
Loop order really matter. It will not affect overall experience of course but your heat dissipation efficiency will be worse. Whole water not heat up at the same time or cool down. Use temp sensor and you will see different temps everywhere in the loop.
One may also ask, do you need to change the water in liquid cooling? If you have an All In One water cooler, sometimes called a Closed-Loop Liquid Cooler, the idea is that you shouldn't have to do any maintenance on it. Many of them are sealed, and can't be refilled. You should never use normal tap water in your water cooler!
Accordingly, do AIO coolers need maintenance?
The only part you have to maintain in an AIO, is the radiator and fans. This is because a lot of dust can get stuck inside or inbetween the radiator and the fans. You don't need to maintain the pump, or the liquid- it's closed and cannot be opened.
How does liquid cooling work?
The water circulates from the engine to the radiator, a system of fins and tubes with a lot of exterior surface area. Heat moves from the hot water to the radiator, causing the water to cool off. The cool water then heads back to the engine. The radiator warms the air, cooling itself off at the same time.
