<br>I saw that I had a active bunch of mosquito larvae in a 3 gallon bucket in the yard. The bucket was full. Decided that it would be an interesting test to see how well bleach worked in "purifying" the water.<br><br>Started with 4 drops per gallon, which is what I thought was the correct amount. Stirred it up. Waited about a half hour - still alive and kicking. Bumped up the dosage to 20 drops/gallon. No change. Let it sit overnight. Next morning all is well, all larvae alive. Finally just dumped probably about a quarter cup into the bucket. An hour later, no change. Dumped the bucked in the garden and called it a day...<br><br>- Does bleach go bad, ie ineffective over time? This was an old gallon jug that only had about 1/8th left, gosh only knows how old it is, no intelligent expiration date listed. Clorox 5.25%.<br><br>- Can/does/should bleach kill mosquito larve (about .25")? If so, at what dosage?<br><br>Thanks!<br>blkjeep