Ro Filter

I got a 6-stage, 100 gallon per day unit from Ebay store PureWaterClub for $60 plus $40 shipping. I've had it since August or September, and it works great. The TDS of my tap water is close to 400, and out of the RODI unit, it's less than 10. Be sure to buy a TDS meter also, or else you won't be able to tell if your RODI unit is working or not, or if the cartridges need to be replaced. I got a TDS meter off of Ebay for $25 including shipping also.
 
It is really nice to get a DIO filter to go with the RO filter. Gets the TDS (total dissolved solids) down to zero. Two DIO cartridges are even cheaper to run then one cartridge. Makes for lousy coffee water but excellent reef water.
 
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