Does anyone collect rainwater for their tanks? I have well water that gaes through a whole house filter. The problem is I burn through these filters about once every 3 wks. Not anywhere near the 3mo. the filter cartiridges say on the label. I have 4 55gl. drums that were used 2 for canola oil and 2 for cocanut oil. I thought about an ro, but for the volume I want they aren't in the budget. Also as I understand about 1/3 of water that goes in the ro is waste.