Royal blue sulfuric reaction?

[duhiliketolick]

Originally had problem with excessive foam (was suggested to switch from a dark to a clear sulfuric acid (both were drain cleaner) which I did). When I applied the current it started normally but turned a royal blue in color. The processor pins had an appearance of having rust on them. I am assuming it is something in the acid. Is there a sulfuric acid that can be bought locally (I have bought from Lowes and Home depot) List brand if possible.

Once again lazersteve to the rescue. Thank you!

 

[lazersteve]

Royal blue would indicate copper sulfate.

Sounds like you need a higher concentration sulfuric.

I use Rooto brand or Boiled down NAPA battery acid.

Steve