Tomatoes are mildly acidic. So yup, Catsup is a decent tool. I like Vinegar myself. Great for flushing through the loop to make sure the channels and tubes get thoroughly cleaned. I actually use that on Plexi aquariums.
Just ordered up a Corsair AX850 and another 6870 for CrossFire. Was thinking about getting some non-ref waterblocks for these video cards, but I don't like the idea of spending all that money on blocks that aren't full cover. In the future it would be nice if ATI would just remove the DisplayPort requirements for Eyefinity. Then I could stop using these Sapphire FleX cards and move to reference model which support the standard, full-cover vga blocks. (Not really interested either in buying expensive active display adapters). Not likely I'll be moving to new displays very soon which support DisplayPort by default since these monitors I have should be good for at least 5 years. Wish ATI would have thought that through a little before finalizing the Eyefinity specification.
Took the side panel off and here's where it currently stands.