Hmm, I would be tempted to say any electrician recommending against a GFCI should lose their license.
First: Which is more important, chance of death versus chance of losing fish tank???
Second: There is an easy solution.
Put different equipment on different GFCIs.
Put in several GFCI outlets. (Wired in parallel, not series)
Controller on one, by itself.
Return pump(s) on one.
Everything else on a different one.
So if one thing goes down, it does not impact critical equipment.
First: Which is more important, chance of death versus chance of losing fish tank???
Second: There is an easy solution.
Put different equipment on different GFCIs.
Put in several GFCI outlets. (Wired in parallel, not series)
Controller on one, by itself.
Return pump(s) on one.
Everything else on a different one.
So if one thing goes down, it does not impact critical equipment.



