Choosing your float:
The Thill Stealth, Mini-Stealth, and Mini-Shy Bite are ideal for shallow water in calm conditions. Smaller sizes will not spook shallow water fish due to softer landings and less splash. Larger, heavier sizes allow for longer casts or casting in breezy conditions. The buoyancy of the TG Waggler and TG Bodied Waggler makes them ideal for fishing deep water in windy/wavy conditions or for making super long casts. When balanced, the longer Waggler sits deeper in the water, providing more stability and wind drift resistance.
After you select your type of float, you need to know how deep to fish. If you're in a boat with a sonar unit, it's easy to get a rough idea. But what if you don't want to motor right over a spot where you think fish are holding, or if you're fishing from shore?
Anglers in the rest of the world use plummets to find underwater structure and to determine the precise depth of their float. If you're an ice angler, you may have seen crude versions of these; clip-on lead weights are commonly used to check depth while ice fishing. By attaching the heavy weight to your complete rig and placing it where you wish to fish, you will have some idea of the depth in that exact spot. It is common to check and re-set your depth several times an hour if you're not catching fish.