[mikoto]

Mixing metals, e.g. aluminum and copper, is a prescription for galvanic corrosion. Corrosion will occur if there is a defect in the aluminum anodization. The rate at which it will occur and to the extent it will occur, I will not hazard a guess.

There are members of this forum who are much more qualified than I to explain the process of galvanic corrosion and what preventative measures to take to guard against it. I will say that using aluminum in a loop with copper is dangerous and should be treated with caution.

I will not advise you to do anything other than what your Reserator manual says you should do. I will only tell you what I have done or would do.

I have always just used a mix of appx. 25% anti-freeze and 75% distilled water and have never had aluminum in my loop and have experienced no problems.

Search the forums, you should be able to find pictures of galvanic corrosion of blocks that are made with copper bases and anodized aluminum tops.