Its operation is very simple, it is an inverted chamber where water calibrated KH4 add a few drops of a reagent to measure the pH. Calibrate water
KH4
is not complicated.
just have to add about 3 ml of distilled water to 5ml of water from the mains, and ready (obviously vary in some cases and others, but it is an approximate formula). Nor is essential
fine tuning, fine ....
There are also commercial solutions and one must be added directly to dropchecker.
Depending on the concentration of CO2 that turn a color solution or another.
Keep in mind that it took a while to turn to the final color, so even though there is good initial CO2 concentration of the solution has a blue color at first.
Let's not get up the CO2 like crazy and make a mess.
If the concentration is weak, BLUE.
If the concentration is optimal, GREEN.
If the concentration is excessive, YELLOW.
Thus we know in which direction to adjust the CO2 injection.
can be found at different prices, sizes, etc..
economic
If you want something you can pull Ebay, but my advice is to always buy similar prices in physical stores or online (preferably English).
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