:unsure: been getting 4 boxes od growth from this guy every month. its part of his prescip. along w/a bottle od cyp. they come 7 to a box, 18 ius/e but with the sterile water its only good for 24 hours. i was told with bacterostatic h2o it will last longer. I was also told it doesn't matter if i mix the bacterio h2o, its only good for 1 day. does anybody know.