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What happens to water while sitting depends on the quality and content of the starting water.
Tap municipal water with chlorine sanitation without aeration in an open 5 gallon bucket will dissipate the chlorine in a matter of hours. After 24 hours or more it will begin to loose oxygen and after a week will begin to grow anaerobic organisms. The PH will drift slowly down due to the calcium carbonate dropping out of solution. Aeration will speed the de-chloranation and the precipitation of the calcium carbonate and will prevent the growth of anaerobic organisms. If the water was treated with chloramines it must be treated with ascorbic acid to remove the chloramines.
RO water sitting in a bucket will absorb Co² this will cause the PH to go down. It does not support organisms well but will loose oxygen over time.
Distilled water is fairly stable coming out of the bottle and will drift down PH very little. It will loose oxygen over time.
Rain and Snow melt are somewhere in between Tap and Distilled depending on how many contaminants it has picked up from the environment.
The major changes in tap water aerating in a bucket take place in the first 24 hours. You can leave water in a bucket almost indefinitely if you are aerating it. Don't leave water without aeration or stirring for more than 24 hours.
Tap municipal water with chlorine sanitation without aeration in an open 5 gallon bucket will dissipate the chlorine in a matter of hours. After 24 hours or more it will begin to loose oxygen and after a week will begin to grow anaerobic organisms. The PH will drift slowly down due to the calcium carbonate dropping out of solution. Aeration will speed the de-chloranation and the precipitation of the calcium carbonate and will prevent the growth of anaerobic organisms. If the water was treated with chloramines it must be treated with ascorbic acid to remove the chloramines.
RO water sitting in a bucket will absorb Co² this will cause the PH to go down. It does not support organisms well but will loose oxygen over time.
Distilled water is fairly stable coming out of the bottle and will drift down PH very little. It will loose oxygen over time.
Rain and Snow melt are somewhere in between Tap and Distilled depending on how many contaminants it has picked up from the environment.
The major changes in tap water aerating in a bucket take place in the first 24 hours. You can leave water in a bucket almost indefinitely if you are aerating it. Don't leave water without aeration or stirring for more than 24 hours.
