The bleach should be ok but you mixed it stronger than it needs to be. 1/4 cup of plain unscented bleach per 15 gallons. Unless you used the wrong type.
Use the plain (and generally least expensive) unscented household chlorine
bleach with at least 5% sodium hypochlorite found in supermarkets; do NOT
buy fresh scent, lemon or other scented chlorine products. Do not use bleach advertised as splash free or proof. Do not use either acid or alkaline bleach solution. Solution with pH 6-7 is best.
Richard & Jill
2014 Flagstaff 832IKBS Classic Super Lite
2018 Silverado 1500 Crew Cab Z71 4WD All Star Edition
Camping since 1989, seasonal since 2000
Car Shredder Op/Tech, Scrap Metal Recycling - retired
The Faster I Go, The Behinder I Get.