It all depends on the temp of the water, and what you are fishing for. It will vary day by day because of the action of the wind and such. In Mex bay west wind will push in the warm water and make the temp drop down.. You may need to be down 120'. Where an east wind will push the warm water out and bring the temp up, and you may have temp at 50' or less. With no way to get temp look at your fishfinder and set to that. Your fixed sliders can be as close as 10' with out tangling , just be careful lowering it down. Remember the ball will blow back so100' of cable may only put you down 80' Trolling is never boring !!