Math Time....hehe
ok.....
The drops 17-18
I think you have multiplied that by 10......hence 170 that is mg/l or ppm these 2 are the same thing.
dKH is the German reading I think most saltys use this (could be wrong there...lol)
Lets start at the drops.......
17x10=170
17.85 is a factor
170/17.85=
9.52dKH
now thats not bad at all....IMO
The next one is your Mg I dont think you can move forward untill you know what readings you have.
good luck
P.S. GH is for fresh.......KH is for salt
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Richard
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My wife believed me when I told her it was only going to cost about $500.00. that was over two years ago and I'm still grounded..... 
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