14 gal plastic tote for container. Lawn mower blade for positive probe. Borax washing soda for conductivity: 1 cup to 10 gal water. PVC pipe to dangle iron pcs from vis heavy iron fence wire. My first 2 pcs are in this photo: the breast strap guide has been soaked in white vinegar, the trip wheel is “raw”. I set charger on 12v. 15 amp manual. Checked charger clamps with multimeter: pos to neg was 0.283 VDC. Checked pos lead to water surface: was 0.112 VDC.