Green "stuff" growing around block outlet/barb

MCT is green isn't it? You might just have a loose fitting or a real slow weepy leak on that fitting...The build up is probably from that....I know once my res plug was a little loose for a while and I got a blue build up on the top of my res on the inside around the plug hole.....I was using blue Pentosin is why mine was blue build up....

If its some kind of crud try using some of this in your loop its good stuff...

...PT Nuke

Yep, it's green. May need to check the fittings then. I plan to disassemble everything soon anyways.

Yeah thats good you can get it all cleaned up then..That PT Nuke is some really good stuff, its copper based to...I've not had any hint of crud in my loop since I started using it...

If I'm not mistaken..isn't the green stuff the result of galvanic corrosion?

A galvanic reaction would only occur if a significant amount of one metal was introduced to another. Like if there was one aluminum block and one copper block, or the water in the loop had a high mineral/ iron content.

shouldnt one bleed, clean and refill every 6 months anyway?

No reason to do it more than once every 12months, but most people probably alter their loop several times so need to do it anyway.

I got some AquaComputer GFX waterblock used that had that in them it is definitel a sign of glavanic corrosion.

My advice: disassemble the GFX waterblocks and inspect closely...my guess is that some thing in there is a disisimilar metal.

It does not have to be aluminum--any dis similar metals will react, The stuff you linked does not prevent galavanic reaction...

My guess is you will find pitting and corrosion on some area...my blocks were junk and totally clogged the stuff.

EDIT: I also get a tiny bit of this on the Danger Den FilPorts.. the screw in plug and the anodized aluminum react--there is not enough flow there to break it up I guess.

I too am guessing you have a seal going. Fix it now before it goes. Even though MCT 5 is non conductive, the dust it combines with isn't and can still fry your gear.

It's an all copper loop, so I don't see how it could be corrosion. Also, it only happens on that particular spot and no where else. I'm leaning towards the loose fitting idea, since that seems more logical.

Yeah I think thats all you have going on is a small weepy leak..If its not your blocks will be pitted up when you take it apart for cleaning it will be easy to tell...

I saw this linked at another place...Pretty good it shows the least noble to the most noble metals in a chart form...Once again showing how really crappy aluminum is to use in a WC'ing loop..

....Galvanic Corrosion Guide

Off topic question. With all the talk about galvanic corrosion and what not, I got a bit concerned when I ordered this for the new T-line I plan to install to replace my res. Kinda' silly question, but that shouldn't cause any problems with my copper loop no?

Yeah thats the Delrin one its fine...I use the brass one for a drain-line...