Previously Asked Questions

• by Calvin on November 16, 2012, @8:40 AM

  does this come with the filters and DI resin when you buy this or do i need to get that in addition to this?

  Bulk Reef Supply Hey Calvin,
  All of our RO/DI units do come with the filters in them right off the bat!

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• by JP on March 13, 2013, @9:36 PM

  I have recently moved and the water quality is not as good as where I was located before. I really like this unit due to it having dual DI cartridges. I was wondering what pressure is needed to run thie unit and also the waste water ratio if known. Thank you...

  Bulk Reef Supply Hey JP,
  To run the unit at spec your looking at 50psi, though anything above that up to 80psi is just fine as well. The exact waste water ratio will vary depending on exact temp and pressure, but one can generally expect 3:1 to 5:1, with most getting closer to the 3:1 unless they are doing something to increase the back pressure on the membrane (like a pressurized storage tank) at which point the waste water would increase.

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• by Ble on January 26, 2013, @12:25 PM

  Hi, what is the optimum and the maximum operating pressures?

  Bulk Reef Supply Hey there!
  All of our 75gpd RO/DI units are rated at 50psi but you can use pressures up to 80psi. Above that is unusual but if you do have pressure that high we would recommend using a pressure reducing valve to bring it back down.

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• by Marcus on October 4, 2012, @2:48 PM

  What size MUR-LOK POLYETHYLENE RO TUBING does this system use?

  Bulk Reef Supply Hey Marcus,
  All of our units use 1/4" tubing. More can be found right here:
  http://www.bulkreefsupply.com/catalog/product/view/id/917/
  

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• by Travis on February 8, 2013, @10:01 PM

  how many gallons of water can be treated until the different items would need to be changed. i have a hard water with a ph of 7.8 from the tap and want to do a 120gallon tank at ph 6 for cardnal tetras and ram ciclads planted with co2 aswell. i know this may be overkill but want a system to use on a reef tank in the near future. thank you travis

  Bulk Reef Supply Hey Travis,
  The exact amount of water it can process will vary depending on the actual water going into the unit, but as a good rule of thumb the sediment filter should be changed every 3000g, the carbons every 6000g, and the membrane after 3-5 years (these numbers are total gallons, waste + product). The DI stage is the last filter and is really impossible to predict as it varies significantly from source to source but you want to change that when the TDS meter reads higher then 0 tds out of the DI resin.

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