With water cooling, you need to buy expensive, proprietary cooling blocks for your individual components. You can cool just your processor, or you can add extra water blocks for your ram, graphics card, hard drive(s), etc. Each additional water block costs extra.

With submersion cooling, you can cool everything on the computer without having to buy extra water blocks. (with the exception of a magnetic hard drive, which has to stay out of the liquid). But you can still cool the hard drive by getting a water block and plumbing it into the system.

You can cut the lid of the tank so that all the ports plug in to the top of the tank. You just have to be careful with wires coming running out of the tank, because the oil will run up the wires like a wick and creates a mess. So, you'll want to make as many connections at the top of the tank as possible.

Now, with submersion cooling, you don't even need to cool the liquid, you can just have the tank and be done with it.

Or, you can wire up a pump and a radiator and an external reservoir. With a water cooled system, you'll usually need an external radiator regardless.

But even with a radiator, the coldest you can get the system is ambient room temperature. I guess that's a lot better than 150-175 degrees or whatever the CPU temp gets up to.

But the real advantage of a liquid cooled or a submersion setup is to be able to cool the liquid below ambient temperature.

electric fly swatters are "safe" to hit people with there is not nearly enough current/energy/heat to do any damage to anything much larger that an insect , also the shock isn't really that painful.

It only hurts like a bitch if you're a little bitch.