06-26-2008, 08:05 AM
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Last night I checked the Ph and Kh in my 125. It had been set up and had water in it for about 5 days and it'd had 2 small crypts and a dozen zebra danios in it for about 24 hrs at the time I tested it. Filtration is 2 eheim 2217s and one marineland magnum 350. Substrate is aquariumplants.com substrate. Decor is driftwood, slate, green pebble, and a couple cocanut halves. The cocanut and driftwood has been boiled free of tannins.
The Ph read 6.4 and the Kh read less than 1 dKh. This was quite a shock to me because the water from the tap when I filled it was reading 10 dKh and Ph 8.0. I checked the tank water four more times and came up with the same readings every time. Confused I checked the tap water again, four times. Last night it was showing a Ph of around 7.4~7.6 and a Kh of 7 dKh all four times I checked it.
So my question is...Where are my carbonates going? Last night I was just confused, but this morning, it occured to me that maybe they could be settling? I didnt think about it before, but the water on the surface of the tank is virtually totally undisturbed because I will be adding CO2, and I was just getting water off the surface to test, could my carbonates be settling? Later today i will check the water near the dispersion bars to see if that might be the case.