Guys, can someone recommend me something similar to RO filters? Something cheap, I want to get rid of Ca/Mg in my water, but I will only using water for 2 plants, so no need for whole house or something big and pricey. Or better saying, just need something to lower my EC/PPM value of tap water. If it removes something else, that would be okay to me. I would like to hear science behind every option.
Maybe something like this?
Please don't comment "get rain water", because I've tried that option and is no go.