Who has the lowest source water TDS?

[ReefRusty]

Perth Australia mine is 264 Tds from my mains ut have RODI unit at 0 TDS but do have the change out resin every 500L but I only go through 12L every 5 days so last me around 4-5 months

 

[Tonycass12]

Northern Michigan well water 5-20tds out of the ground depending on the season and always 0 after my rodi. Ive not changed any of the filters on my system in about a year now.

 

[N.Sreefer]

Dartmouth Nova Scotia (prior to infrastructure "update") 3-15 throughout the year. Now they're working on the water processing facility and were getting halifax water pumped over 300 ppm... Woot.

 

[jhuntstl]

Usually 150-300 in St. Louis, MO. Also have to use a special carbon block for the chloramines.

 

[InactiveAcct]

450 in Brevard county FL, go through DI resin quickly

 

[KStatefan]

Surprises me that 0-50 is the most popular answer

375 here in Kansas

 

[Zach B]

Well water 440 + High CO2... I have multiple whole house sediment & carbon filters after the softener. Then I run a 9 stage RODI. Nothing exceeds like excess

 

[Forty-Two]

12 here on a mountain in Israel

 

[Chrisv.]

I was super proud of my 60-70 just north of Boston until I saw this thread! It is much lower tds than the other places I have reefer (a md suburb of dc and Durham north Carolina)

Do you guys with 15 tds even bother with RO, or do you just let di take care of it?

 

[AcroNem]

205 in SLC. Last place we lived was around 130 but a lot of CO2

 

[Chrisv.]

205 in SLC. Last place we lived was around 130 but a lot of CO2

Do you measure the CO2 of your water supply?

 

[AcroNem]

I haven't in our new place we just moved to, but did at our last. I was getting less than 100 gallons on a DI canister.

 

[Chrisv.]

I haven't in our new place we just moved to, but did at our last. I was getting less than 100 gallons on a DI canister.

Totally uninformed here: how do you test dissolved CO2?

 

[Gtinnel]

Right around 100 in Charleston, WV. It's not great but it could be a lot worse. It's good enough that out-of my membranes I still only get about 1ppm which usually drops to 0 in the colder months.

 

[AcroNem]

Totally uninformed here: how do you test dissolved CO2?

You can get test kits for it, Bulk Reef Supply sells one.