What's the TDS of your tap water?

[VJV]

Lisbon, Portugal: 60-70ppm out of the tap, 0 post DI.

 

[klondike4001]

Houston, TX

Tap: 475
RO: 3
DI: 0

 

[jeffp1]

Northwest Fl. 300 out of tap and 0 out of Ro/DI

 

[tom39]

Spotsylvania Virginia
93 TDS from tap
2 TDS from RO
0 TDS from DI

 

[Bombertech]

TDS is 14 in 0 out, Portland OR

And that's why you can run a dual DI without an RO membrane in parts of the PNW

 

[DFW]

Fort Worth, Texas - 160

 

[nyfishkid87]

2 tds from tap, 0 from to unit

 

[nyfishkid87]

* ro. Here in lower westchester, NY

 

[Randy Holmes-Farley]

2 tds from tap, 0 from to unit

You have 2 ppm TDS from the tap, before the RO? That seems unlikely.

Not sure if you are on the same supply that Yonkers uses, but their NYC water supply has a conductivity that would have a TDS of about 30-60 ppm TDS.

http://www.cityofyonkers.com/home/showdocument?id=11887

 

[nyfishkid87]

I was just looking for a picture of the I incoming and out of the ro unit.. I thought i was seeing things when i saw those numbers. Anyways, my town was voted best tasting water for 2015

 

[Randy Holmes-Farley]

I expect it is a calibration error. I do not think any natural water is that low. Even contact with air will add 1 ppm TDS from CO2.

What town? We can look up the water report.

 

[jwardecker]

Tap is 200 here in Eastern PA. I am currently using ro/di from the Weis grocery store.

Same place I get my water. Never had issues. Carlisle pa.

 

[nyfishkid87]

I have handheld tds meter and my unit has one built in. I notice i don't burn through a lot of filters which is always a plus. I am just happy to get 0 tds coming anyways lol. My tank is always crystal. I was debating whether the use ro di, or tap water with prime to fill up my 220 gallon tank. Glad i went rodi.

 

[Randy Holmes-Farley]

I have handheld tds meter and my unit has one built in. I notice i don't burn through a lot of filters which is always a plus. I am just happy to get 0 tds coming anyways lol. My tank is always crystal. I was debating whether the use ro di, or tap water with prime to fill up my 220 gallon tank. Glad i went rodi.

Well, OK, but I don't think the 2 ppm TDS is real, and don't want readers to be misled thinking it is.

 

[austin55]

West Winfield NY
When I first turn it on the in is about 3ppm after running its 0ppm going in. So I didn't use a ro/di system cause I didn't see the point if my water is already 0ppm tds. Im now having algae problems which I think is because I'm using tap water. So now I'm using the ro/di am I wasting my time?

 

[Reef_a_holiks]

sink water TDS 130ish. out the R.O system TDS 0

 

[Fin]

Me: Lake Charles, (SW) Louisiana, USA
Tap: 379
RODI output: 0

We do get an annual breakdown of what is in our tap water from our water company. Unfortunately, since I use an RO/DI filter, I never paid that much attention to it.

 

[nyfishkid87]

West Winfield NY
When I first turn it on the in is about 3ppm after running its 0ppm going in. So I didn't use a ro/di system cause I didn't see the point if my water is already 0ppm tds. Im now having algae problems which I think is because I'm using tap water. So now I'm using the ro/di am I wasting my time?

You are definitely not wasting your time. ro di get's rid of metals, chlorine, chloramine and other contaminants so it is very useful. I use to be in the same boat when i saw low low low numbers from my tap. I said maybe i don't need a ro unit if i am getting 2 tds. Well i never regretted my purchase of my ro di. Mine has a di bypass which i use to fill up and for emergencies, picnics. You can call your town and ask them what they use to treat your water. But i can definitely vouch for ro di unit.

 

[Randy Holmes-Farley]

West Winfield NY
When I first turn it on the in is about 3ppm after running its 0ppm going in. So I didn't use a ro/di system cause I didn't see the point if my water is already 0ppm tds. Im now having algae problems which I think is because I'm using tap water. So now I'm using the ro/di am I wasting my time?

That's a potential mistake. It doesn't matter what the TDS is, you want to remove things like copper from your own pipes. TDS is not a measure of suitability for a reef, and should only be used to determine if an RO/DI is working right.

I also do not believe those numbers are accurate, but even if they are, using a DI only is very inexpensive as it will last a very long time.

 

[Musipilot]

350 here in NYC. The funny thing is, 50 years ago Life magazine ran an article saying NYC tap water was the cleanest in the country and people still quote it and call me nuts for my RO/Di system. Hey, anyone know where to get a hula hoop? It's the latest rage...