Yes Zerowater filters work. Other brands of drip filters are not designed to remove minerals, only chemicals and metals and are not suitable for this purpose. Do keep in mind that Zerowater filters may not last very long depending on how hard your tap water is.
All my plants get is water run thru a ZeroWater filter. While the tds of the water before the filter is low, I feel it gives me a degree of safety by doing that. I am on my 2nd filter in about a year, but that will change as my collection has been growing and I am using more water.
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