iam dead set to water my garden with only rain water. so far i have been lucky,after each rain i refill about 5 1gal jugs.one is to mix with and 4 back up. so far all is well. they last 3 weeks. this is first grow. put seeds in dirt NOV> 3rd now into flowering 3weeks. cfls 300wt 2ft x2ft closet 5ft tall. lower space set to veg. 2nd grow. seeds bro got in florida .one day i might mail order seeds. but this way gives me skills for better on 3rd grow.that one i pland to push it to be the best of the best. all set your golds in real time, this way you have time to stop and think, about next move!