Jump to content

Question about RO/DI. Advice needed


dunkuboyz
 Share

Recommended Posts

Hi all,

Need some help... I'm currently using an RO/DI from madpetz rated at 400gpd which comes with 2x200gpd membranes. I've been using this filter since the past 8 months. Plus minus, I use about 600G per month.

Over the past 2-3 weeks, I have been noticing diatom blooms despite PO4 and Nitrates at desired levels. It could possibly be overfeeding too....

But, was wondering, how long does an RO/DI membrane last? When do I know when to change it? Or should I change it on a yearly basis?

What about the DI resins? Do we need to top it up or replace it at regular intervals?

I guess, I have been neglecting the filtration part of my system.

Please advice and help...

On another note, can anyone help suggest where to get affordable replacement prefilters, membranes and resins so I can do more regular changes.

Many thanks in advanced

Link to comment
Share on other sites

Understanding how RO membranes work, unlike per filters, they do not exhaust.... Rather, they get damaged. Basically, at the RO membrane, filtration due to osmotic pressure rather then the hydrostatic pressure comes into play in contrast to hydrostatic pressures at the prefilters resulting it in requiring frequent changing and getting exhausted. In a nutshell, Impurities get trapped in prefilters, but not in membranes.... It's not suppose to.... At the membrane stage, pure water seeps through the membrane via osmotic pressure leaving behind water with highe concentration of dissolved impurities which gets wasted. Now, my question is... How will I know if it is damaged? From what I read, TDS is not an indicator for a membrane change.... As for the resins, do you add or do you replace and throw away the remaining in the cartridge? Many thanks

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share



  • Join us on the largest Reefing community in Asia!

    Sign up and share your reefing journey with us, make friends and get helps from the community .

     

  • Topics

  • Latest Update

    1. 0

      专业制作美国普渡大学西拉法叶校区大学毕业证》Q/微信751558146丨办理普渡大学西拉法叶校区毕业证成绩单,文凭留信网认证,保录取Purdue University,West Lafayette

    2. 0

      〖国外毕业证书〗加拿大MSVU圣文森山大学毕业证成绩单〖Q/微信751558146〗办理文凭教育部学历学位认证Mount Saint Vincent University

    3. 0

      专业制作美国福特汉姆大学毕业证》Q/微信751558146丨办理福特汉姆大学毕业证成绩单,文凭留信网认证,保录取Fordham University

    4. 0

      〖国外毕业证书〗加拿大McGill麦吉尔大学毕业证成绩单〖Q/微信751558146〗办理文凭教育部学历学位认证McGill University

    5. 0

      专业制作美国PITT毕业证》Q/微信751558146丨办理匹兹堡大学毕业证成绩单,文凭留信网认证,保录取University of Pittsburgh

×
×
  • Create New...