You could show a close-up of the wet bits or you could put some kitchen towel in the area so you can see it soaking up the coolant.
In a nutshell. Watercooling is not very different from aircooling with one exception. With air as the cooling medium, you've got air all around you so you don't desperately need to contain the air - although it's helpful to keep hot and cold air separate for efficiency. Water is a more efficient medium for cooling because it can hold more heat and transfers that heat more easily. So you stick a heatsink on what you want to cool - same as with air but with shorter fins - and pass water through it to take the heat away. The difference is that you also have a lid sealed over the top of the heatsink so that the water cannot escape.
Pump: Does the same job as a fan does in aircooling - moves the hot coolant away and provides cold coolant.
Reservoir: Mainly just spare coolant but also beneficial to make sure the pump has something immediately available to pump. Also helps get the air out the system (called bleeding) as the air bubbles out.
Radiators: In air cooling, you don't care about cooling off the air as you just draw fresh air in - there's plenty of it...if not, you've got bigger problems! With water, you can't have an inexhaustible supply of fresh water so you have to cool your coolant and recirculate it. That's what the rad does and in the same way as air cooling - just with a larger surface so you can have say three fans blowing slowly through it quietly and achieve the same effect as one fan on full blast sounding like you've got some sort of air raid siren running.
Fittings are just to connect your tubing to the blocks and your tubing is just to carry the coolant round the loop. Lights are to make it look pretty
Right, I've either got to go on holiday now or get a divorce so good luck with OCUK - they're normally very good to deal with so once you get hold of someone more in the know, I'm sure you'll be fine.
In a nutshell. Watercooling is not very different from aircooling with one exception. With air as the cooling medium, you've got air all around you so you don't desperately need to contain the air - although it's helpful to keep hot and cold air separate for efficiency. Water is a more efficient medium for cooling because it can hold more heat and transfers that heat more easily. So you stick a heatsink on what you want to cool - same as with air but with shorter fins - and pass water through it to take the heat away. The difference is that you also have a lid sealed over the top of the heatsink so that the water cannot escape.
Pump: Does the same job as a fan does in aircooling - moves the hot coolant away and provides cold coolant.
Reservoir: Mainly just spare coolant but also beneficial to make sure the pump has something immediately available to pump. Also helps get the air out the system (called bleeding) as the air bubbles out.
Radiators: In air cooling, you don't care about cooling off the air as you just draw fresh air in - there's plenty of it...if not, you've got bigger problems! With water, you can't have an inexhaustible supply of fresh water so you have to cool your coolant and recirculate it. That's what the rad does and in the same way as air cooling - just with a larger surface so you can have say three fans blowing slowly through it quietly and achieve the same effect as one fan on full blast sounding like you've got some sort of air raid siren running.
Fittings are just to connect your tubing to the blocks and your tubing is just to carry the coolant round the loop. Lights are to make it look pretty

Right, I've either got to go on holiday now or get a divorce so good luck with OCUK - they're normally very good to deal with so once you get hold of someone more in the know, I'm sure you'll be fine.