The liquid will last just as long as in a regular DC, I would change every month or so. The "oracle" just make it easier to discern the color of it. I want one badly.
Has anyone used the "Double Check" that CAL AQUA makes? I was planning on buying the "Oracle" but after seeing the double check I can't decide, any recommendations?
Both are nice DC's i really like the looks of the Double, but i cheaped out and got regular one and just position my white mag float behind the DC to get an accurate reading
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