I have a HF extreme acetal + nickel and just brought back two 6970 acetal + nickel last week. My loop isn't running yet although I'd installed the blocks to my gpu. Article from VRzone suggests that ek is aware of this issue and has stopped selling these blocks and have extended the warranty. Regardless, I'm not too interested in having problematic parts in my system whether the warranty is extended or not. So for those who have nickel ek waterbloicks, what are you planning to do or in other words what options do we have? I'd imagine swapping to copper blocks and getting a refund on the difference would prevent the issue somewhat but the blocks don't look as nice and copper would oxidize in msia weather very quickly.

I installed my blocks but haven't actually "used" them. I don't want to take apart my system once I have everything running. I'd requested to swap out everything to copper version. Also, I don't want to have to deal with flaked nickel plating all over the tubing, pump, res, and etc.

There's nothing wrong with their copper version. If you were to look at Koolance and XSPC's blocks, they are mostly pure copper on the base. So I think this is going to be the best route to go with EK.

I'm in the process of discussing for an exchange to Acetal (copper) blocks since I just recently purchased the blocks. Heck, I don't want to worry day after day whether my blocks are affected or not. I am running black tubings, can't even see if there's any Nickel flake should the plating come off.

I've received my Supreme HF Acetal + Copper today. Waiting for the 6970 Acetal + Copper to arrive. I rather deal with oxidization than peel-iazation