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Originally Posted by redFishblueFish Wow, this is really neat. Any idea of what kind of microcontroller he used (PIC?) |
I used TI's MSP430F149 here. I don't like PICs at all
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Originally Posted by R0bert The graphs are a little misleading because the ph at bottom right is different for each one. This makes the ph swing seem much bigger than it actually is.
I wonder what the KH is? |
As niko wrote above, that's probably an evidence of gradual CO2 exhaustion. Maybe after a couple more days without CO2 injection the low/high levels would not differ daily.
Tank's kH is about 6-7 deg - a good carbonate buffering ability. I suppose the swings would be much greater in softer water.