Depends on the type of hardness. In some cases yes, it can soften by almost half. I've done the experiments myself.Hello, Does boiling water lower ppm/soften water? if not, what would?
Usually once the mulm that's pulled out by boiling (aka temporary hardness) has been pulled, the water's alkalinity (hardness) drops significantly, and the pH then becomes a more a function of other factors, such as O2 saturation vs CO2 saturation (O2 raises pH, CO2 lowers it) play a larger role in pH levels and how well they stay within a particular range.I was wondering this exact question the other day but in terms of acidity/alkalinity. I googled it and I found that boiling water raises the pH and even after it cools it still remains somewhat above neutral. This sheds a little more light onto how that works, so thanks for the info guys!! First post woot woot!
Personally, I'd stick with the Brita filter I use to drink faucet water or let it sit for a few days- both seemed to have worked so far for my grow.
So the plant's can use the nutrients offered.why do you need to soften (pH down) your water?