Ground balancing below 20 on the AT PRO

[dereklang]

Ground balancing below 20 on the AT PRO

Hey guys quick question I'm using the AT PRO in saltwater and was having problems with noise. I had to manually ground balance to around 16 (as stated ranged in the manual ) but I'm worried as I read somewhere that having such a low ground balance affects the lower conducting targets like gold. While a high ground balance above 80 affects targets like silver. Is this true? I did find some targets today all junk though.

I'm using zero mode with iron audio

 

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[Irishgoldhound]

I own an AT pro and never heard of that. Maybe John in Edmonton can answer this. I would like to know as well.