Looks like the pool calculator comes up with 196 oz of 8.25% bleach so basically 1.5 gal jugs to get to your target of 24. Hopefully you're using the 10ml line and multiplying by .5? Or I've seen where some say at that level you could get away with a 5ml sample and each drop will be 1ppm. Anybody want to chime in if this is ok?