[Tangster]

I'd have to disagree with you or Boomer or Randy the water guy or any one else if they ever made a comment of Carbon dioxide being exposed to our Lime water mixes has little or no effect on its potency . If they did say it then It tells me they are not one I'd take advice from on the subject Myself IMO. Anyone who ever tells you that Carbon Dioxide does effect the strength of lime water solution is totally wrong and misinformed

That’s why anytime L/W is left set exposed to the air it will form a crust on the surface , the reason that crust forms is Its the formation of calcium carbonates a reaction that is caused from exposer to the carbon dioxide in the air. That’s the main reason to pull your stored L/W from the bottom of the holding container rather then breaking that crust seal . That crust seal will form on the top even when sealed tightly but to a lesser degree as all that is being exposed to was the limited air that was trapped inside when the bucket was sealed. the purpose for the crust on the surface and top for our uses of lime water is to help to keep the lower water from exposer to the Carbon dioxide and help limits the penetration of carbon dioxide into the holding vessel that caused the crust on the surface in the first place. Now what that crust is is actually calcium carbonate and that is of not much value to out tanks or corals to be more specific. But as I said earlier exposer of our Lime water to air lowers the mixes strength a lot. I tell you what a air stone to a bucket of Lime water and tell us what all settles out of solution to the bottom of the bucket. You won’t have much of anything you went to all the trouble to mix it for left in the mixture to feed the reef corals. IMO I'm not a expert I could be wrong here ? But I have been using these methods for many yrs and its never failed me and until it does I'll just keep on with its use and I'd recommend anyone else to do there the same way.