Some background here: I'm an electrical engineer, working on a project that is likely going to require liquid cooling. As part of the installation of this liquid cooling system, a joint needs to be made between copper pipe and a pipe fitting. This will carry only coolant mixtures, not anything potable, so lead content is not an issue.
Is there any reason that I should not use electrical solder (of which I already have plenty) to solder this joint? I know that plumbing solder usually doesn't have a flux core like electrical solder does.
If it is fine, will I still need to use a separate flux paste? I imagine I probably will, but in the interest of having a complete answer that's useful to other people, the opinion of someone who knows more of what they're doing with plumbing than I do is valuable here.