In your pool, a gallon of 6% bleach will add about 4ppm of chlorine. Go ahead and add 3 gallons which will take you to around 12ppm. Over the weekend, each time you can, test and add enough bleach to get the chlorine level back up to 10-12. Go ahead and order the K-2006, but in the meantime, you can force your kit to read higher than 5 by using dilution. (Not super accurate, but better than nothing.)

Info here: Testing Without a Good Kit

Run your pump 24/7 while working to clear the pool and backwash your filter when the pressure rises 8-10psi over clean filter pressure.



Hope this helps.