As many may know, I was buying MANY bottles of Distilled water for my DWC at my local store each bottle cost me .95 this really adds up to the grow cost weed is a thirsty plant!!!. I got a 5 stage RO filter and a TDS meter I have been using it for all DWC watering needs.
My first water bill came today it went UP by a whopping $3.00!. My cost per gal. for DWC water, is now 4.1 cents a gal. The RO filter in itself will save about $120.00 a grow!. The filter provides me many gallons (they claim 500 gal.) of low 0-5 TDS water for a low price. (note) I also saved $62.13 on electricity by using the reduced wattage 400 Watt 10K MH finishing bulb during vegetation instead of a 7K normal vegetation 600 Watt one . All together I figure I shaved about $200. on grow costs. My goal is to reduce grow cost to about what a garage freezer cost to run but maintain a respected harvest, or balance between cost and pay out .