This is what fuel pump strainers and fuel filter are for. If you ran the car, replace them. You need to drop the tank and just clean it out...it won't harm your engine but it can make it run like crap. Back in the day, it could stop up carb jets and cause all kinds of carb problems. Fuel injection systems are not as easily harmed. Sugar and Salt do not absorb into gas, it will just sit in the tank, it has to be cleaned out.