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Water hardness levels
I just finished reading an article called "General and Carbonate Hardness"
by Albert J. Thiel. In this article he offered "suggested levels for
hardnesses" in tanks:
"Freshwater fish-only tanks - dKH or carbonate hardness: 7-8
General or total hardness: 4 to 5
Freshwater plant tanks - dKH or carbonate hardness: 3 to
total hardness: 2 to 3 maximum"
My question is: if the above is to be accepted, how does one adjust for a
plant tank WITH FISH?