That sounds about right. 7-9 tablets I would venture to guess. I think right now, my intention would be to supplement the tablets with bleach. I guess it depends on how easy it is to make the switch. I still have a few tabs that could be used up, if it takes a while to make the switch to bleach. Honestly I think its going to come down to money. If its cheaper to stay with the tabs I will probably do that. Considering the amount of money I spend in fuel to get to the local pool store (20 miles) versus the nearest Food Lion (5 miles). Couple that with the fact that Food Lion is open 7 days a week and my local pool store is closed Sundays (which seems to be when I need to get there the most)...