RO/DI Unit. 4,5, 6 statge?

[LeftyReefer]

Your water has significantly higher levels of chlorine than my local water does.... a second carbon block might not be a bad idea, but hard to say if its going to be necessary or not at this point.

As far as chlorine, my local water had a test range of .9 ppm up to 1.11 ppm chlorine, with an average of .99 ppm chlorine. Basically the chlorine in my water doesn't vary much from 1 ppm at all times.
Your local water had a test range of .2 ppm up to 2.7 ppm, with an average of 1.65 ppm chlorine.

So just based on a comparison between your water and mine, your water average 65% higher levels of chlorine than my water does, and can be up to 2.5 times higher at times.
.99 average vs 1.65 (165% higher)
1.11 max vs 2.7 (243% higher)

At the minimum, I would probably run a .5 micron carbon block as your 2nd stage and see where that gets you.

 

[jbozarth78]

Your water has significantly higher levels of chlorine than my local water does.... a second carbon block might not be a bad idea, but hard to say if its going to be necessary or not at this point.

As far as chlorine, my local water had a test range of .9 ppm up to 1.11 ppm chlorine, with an average of .99 ppm chlorine. Basically the chlorine in my water doesn't vary much from 1 ppm at all times.
Your local water had a test range of .2 ppm up to 2.7 ppm, with an average of 1.65 ppm chlorine.

So just based on a comparison between your water and mine, your water average 65% higher levels of chlorine than my water does, and can be up to 2.5 times higher at times.
.99 average vs 1.65 (65% higher)
1.11 max vs 2.7 (243% higher)

At the minimum, I would probably run a .5 micron carbon block as your 2nd stage and see where that gets you.

Thank you for the post. I am not seeing Chlorine on this chart. Is there another term for it?

 

[LeftyReefer]

Thank you for the post. I am not seeing Chlorine on this chart. Is there another term for it?

That's because they stopped putting it on the chart for some reason. I was using results for previous years, when it was still being reported.

per the 2015 report, chlorine was .3 - 2.8 with an avg of 1.59 ppm
per the 2016 report, chlorine was .3 - 2.7 with an avg of 1.61 ppm
per the 2017 report, chlorine was .3 - 3.1 with an avg of 1.60 ppm
per the 2018 report, chlorine was .3 - 2.7 with an avg of 1.65 ppm
There was no 2019 report, and then the 2020 report showed chlorine, but no test results reported, and then it was removed from the report completely.... so I was using the latest info per the 2018 report.

 

[TLO45]

Achieving the best 0 tds water isn’t a cost decision. It’s about filtering out what is contained in the source water. Get a report from your water provider and make the decision based on that report. It will provide you with information if you require a 4 stage or 7 stage. Don’t rely on anecdotal “this worked for me” stories.

Exactly what I mentioned above! Make sure you know what is in your source water!

 

[jbozarth78]

To be clear. I have been going to the LFS for RO/DI Salt and Freshwater, but tired of driving 40 minutes every week. Have not been using tap water. Also, I want to use the Red Sea Coral Pro salt I have and they use a different salt.

 

[LeftyReefer]

To be clear. I have been going to the LFS for RO/DI Salt and Freshwater, but tired of driving 40 minutes every week. Have not been using tap water. Also, I want to use the Red Sea Coral Pro salt I have and they use a different salt.

I did the same thing for my first year of reefing. Lugging 5 gal containers back and forth to my LFS weekly.
Don't miss doing that at all! I absolutely love having a RO/DI unit at home now.

I lucked out and got my 4 stage 100gpd unit from Marine Depot when they were doing their going out of business sale... Or rather their being bought out by BRS sale. anyway, they dropped the price of their 100gpd 4 stage units down to like $80 each and then down to $64 each a few days later... I grabbed one at that price. $64 for a full size (10") 4 stage rodi with pressure gauge. Crazy good deal. I ordered up a triple TDS meter from Amazon for $32 and I was making my own 0 TDS RO/DI at home for under $100.

A few weeks ago, I added a 5th canister/stage to add another carbon block and it only cost me $40 and about 15 minutes to add/install.

So now I've got a 5 stage, 100 gpd RO/DI with pressure gauge and triple TDS meters all for under $140.

Being quoted $1600 for that is mind blowing. Maybe I need to go into business installing RO/DI's too! haha.