[WILLIAM1]

I only use RO water thats it nothing else will do. You can get a great RO unit for about $200. I would check out ebay or craigslist. I have the same size tank as you one time when my RO unit was down I went to walmart and used the self serve RO despinser for $1.25 gallon I got 20 gallons. Recently I had to refill the bottles again for a water change 33 cents each thats it. The water hasnt been so clear in months. Im pretty amazed in the quality.