Ground Balancing for the CZ21

Hi,
I'm fairly new to metal detecting. I bought a cz21 couple months ago, and been going out to the beach around once a week. I'm still not exactly sure on what Ground Balancing level I should set it to. I hunt on sand, and yesterday I tried it in shallow water. If anyone knows the right settings for beach and shallow water.
Thanks

J. W. Fisher does not make your CZ-21, only pluse detectors.  But your new to Tnet.  Fisher Research Labs is the forum you want.

It is best to GB in Autotune with volume turned up all the way and sens too.  Raise and lower the coil while listening to the threshold.   Adjust till tone is about level then turn sens down to near preset and volume where it is comfortable to your hearing.  A setting of 0 will give you three tones, Low, Mid and High.  A setting of 1 won't give you the low iron tone.  At beaches with competion from other hunters I won't even waste time scooping the High tones which are mostly coins and only scoop the Mid tones which are pull tabs and gold rings.  Silver rings are high tones. 

http://web.archive.org/web/20090406063943/http://thegoldenolde.com/

J. W. Fisher does not make your CZ-21, only pluse detectors.  But your new to Tnet.  Fisher Research Labs is the forum you want.

It is best to GB in Autotune with volume turned up all the way and sens too.  Raise and lower the coil while listening to the threshold.   Adjust till tone is about level then turn sens down to near preset and volume where it is comfortable to your hearing.  A setting of 0 will give you three tones, Low, Mid and High.  A setting of 1 won't give you the low iron tone.  At beaches with competion from other hunters I won't even waste time scooping the High tones which are mostly coins and only scoop the Mid tones which are pull tabs and gold rings.  Silver rings are high tones. 

http://web.archive.org/web/20090406063943/http://thegoldenolde.com/

Thank you very much for the help.