So I have a SWG, but it's not working (long story). I will be away for 3 days this weekend. Is there some sort of formula out there about how much chlorine I can/should dump into my pool before I leave so that it doesn't dwindle down to zero before I get back? What about if I go away for a week, again assuming that my SWG is not up and running? Should I just bring it to SLAM levels? Thanks.