Mr. Saltwater Tank TV Friday AM Quick Tip: The Easiest Way To Keep Your RODI Water Clean

Making RODI water is one thing, keeping it clean is another. Here’s an easy way to keep your RODI as clean as possible

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Comments for this article (17)

  • Devin says:

    Thanks for the tip Mark…really cool shirt!!


  • Ron Messinese says:

    I have kept a lid on my RODI ever since I installed it. But I am noticing a slime feeling when I go to use it. So I dumped it, washed it out, (water only) and refilled it. I still feel that slimy feeling. Should I use something other than just water to rinse, or is there a cleaner that I could use?

  • John says:

    Can you get rid of that pop up on your site for getting personality guide? I already have it and major pain using your site from iPhone.

  • Jeff Wagner says:

    I work with RO/DI water all the time in the semiconductor industry. One thing about DI water is that it is prone to bacteria growth if allowed to sit still. All of the process tools we build have return loops on the DI water supply to keep it moving so bacteria do not grow in the pipes and tanks. The slime that Ron mentions is bacteria growing on the sides of the container. Not to contradict your advice but I keep an airstone in my DI and mixed saltwater to keep them moving and use a lid in addition to this. No slime layer and my water stays nice and clean.
    It is important that the air pump supplying the airstone is in a clean place. Free from dust , car exhaust if in a garage and any other source of contamination.

  • Thanks for the info Jeff. Have you ever tried a power head instead of the airstone?

  • Matt says:

    Good stuff. I wonder what would be more energy efficient. Air stone or power head?

  • Ron Messinese says:

    I do have a power head in there, but do not run it until I need to pump water out. So what is the best solution for sterilizing it and getting rid of the bacteria?

  • Jeff Wagner says:

    A powerhead would work just as well to keep the water moving without the risk of air contamination (if the environment is questionable where the air pump is placed). I thought about that right after I sent the comment.
    I do not think you have to sterilize the water, just keep it slowly moving. We have a very large RO DI system here and while we do have a UV sterilizer in the polishing loop, as long as you are using the water up in reasonable amounts of time and not trying to store it for months none of that is needed. After Mark mentioning a powerhead I think putting a small one in your container and using a lid will be all that is needed to keep your water in top form. And a very small powerhead is plenty of motion. Too much motion will encourage gas exchange and increase absorbed CO2.

  • Steve says:

    Mark, your website is victim of the heartbleed bug. You should contact your hosting service about patching.

  • Steve…my hosting company patched and I ran the heartbleed checker for my SSL and everything checked out. Where are you seeing the issue?

  • Daniel says:

    If you keep RODI water for long periods, like with an automated waterchange system, you should have a UV on the system. If the bacteria gets too bad, it will become very bad for your your livestock. Toxic bad… Either that or keep it for small amounts of time and clean with vinegar between uses. I asked Mark this question a while back about “stinky RO water”. Air stone will keep fresh saltwater clean and fresh. It has good bacteria in the salt. This is my experience.

  • Steve says:

    im not seeing the video mark when i click on the link

  • Julie says:

    I am not seeing the video either when I click on the link.

  • Julie says:

    Well scratch that. After submitting my comment, the video showed up.

  • Andrew says:

    And the lid also keeps the cats from using it as a drinking bowl:)

  • MarineSniper says:

    Buckeye Hydro here in Ohio has great information on sterilizing your rodi unit along with the holding containers. I never thought to do that with the unit but after speaking with them, now do it every year when I change my carbon and sediment filters. Not trying to plug the company, I’m simply a loyal customer and they gave me a great procedure for making sure everything is clean and sterile. You can email them with any questions, if they don’t have the sterilization link on their new page

  • Mike says:

    Good tip Mark. I took mine a step further and added some self adhesive foam weatherstripping around the top of the brute can for a tighter seal.

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