In another post on this brilliant site I saw someone suggest that an aquatic species could make insulated tubes filled with seawater to transmit electricity, with the only downside being that seawater is ~10million times less conductive than gold. I really loved the theme and uniqueness of the idea so I thought how could it be made more effective?
So my question is thus: would dissolving minerals (not necessarily gold, I only used that as an example) of some kind into contained seawater improve its conductivity? In the same way that the solution of salt in seawater already increases its conductivity roughly a million times when compared to fresh water.
If this is possible, how would a species go about dissolving the mineral?
What mineral would be the most effective for the job?
In fact, would simply increases the salt solution noticeably alter conductivity and if so, how much?
And how effective could these methods get when compared to conventional gold, copper or silver wire?
This method of "wiring" needs to be at least conductive enough for the electrical demands involved with computers. Size is not a concern, the species will either use very large computers or I will just handwave them having shrunk the technology to an incredible degree, I am after all writing a fictional work not a scientific paper. Assume that the aquatic species to have manipulative ability akin to human hands and that they have access to all the resources of earth's oceans. Please do not suggest obvious alternatives such as "they could just extrude some copper into wire" as, while true, I am obviously trying to worldbuild an interesting and unique setting with differing technology to ours, I am not trying to adapt human techniques to an underwater setting. Even if they are the most effective. Other than that feel free to suggest other alternative ideas for electrical conduction that fit the theme.
Thanks in advance,
P.S. I understand that I have asked a series of successive questions in the body of the question but I see them as elaborations and sub-questions in the hope of getting a more thorough answer to my overarching query. I also don't want to needlessly bombard the WorldbuildingSE with a bunch of incredibly similar separate posts, so I hope my inclusion of several queries in the body of my question meets with admin approval. :)