KH adjustment needed
I have a question on adjusting KH. But there is a catch. In our city the tap water usually runs at a 7-9 KH depending on the season. We get our water supply from the local river that is Glacier and runoff fed from the Rocky Mountains. So for the most part our water is very hard to hard all year long. Without using R/O water is there a good and reasonable way of adjust the KH to a 4 or 5 degree for my planted tanks? This would also need to be relatively problem free in the tank so as to not create compound issues in the tank....i.e algae, etc...
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