If you have the room for a reservoir i recommend forgoing the kalk reactor and just mix up a few weeks of kalk at a time. I have a 55 gallon drum in a closet on my 180 and a 37 gallon one for my 90 and they each last a good while. I have used kalk reactors in the past but had difficulties during operation , plus they are expensive.
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Anthony
red house, up there^ = my tank pics
"Use filters"
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