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christian1971
05-17-2011, 09:17 PM
I just checked my water hardness using the API Carbonate Hardness Test Kit. It took 18 drops. Result: 322.20 KH
Note: The water softener was not being used at the time of this these tests. That would probably help.
So I did a test using water coming from my filtration unit. It only required one drop for the water to turn yellow.

I did a bit more digging and found out that my filtration unit makes 75 gpd. which is the size of my aquarium. So would my ro/di water not having gone through a water softener be good to go?