Hey, I have now finished building my PC and have got windows on it etc. however on one of my tubes it is quite thin but it's not a kink in like one place, it's along the entire tube. Now it is only thin after i turn the pump on and water is flowing through it, so when it's off the tube is normal shape and all round and fine but as soon as i turn the pump on, the entire tube thins out. To me this seems like there is an imbalance of water somewhere and the other tubes seem to have much more. Could someone please offer me some advice about this? thanks.