Ok IF you do that, you need to leave it open. You don't need to bother letting it off gas and in fact it will reduce oxygen available to the roots.
WashougalWonder Reviewed by WashougalWonder on . WATER QUESTIONS? Hello, there is a theory that you should let tap water sit out for 24-48 hrs before using it, my question is if you let it sit out covered or sealed (I.E. old plastic milk containers with the cap on) is it doing any good, or does it need to sit uncovered? newbie thanks!;) Rating: 5