LFS Sells RO but say RODI

[Hoxie]

Hello fellow Reefers!

One of my LFS, where I have bought my water, has been selling RO water while advertising RODI. I have not confirmed this with them but have heard from another LFS that has been around longer that this is known as a more experienced shop. He informed me has tested the water and it comes back with 5ppm Nitrate and TDS (Don't remember ppm). And our tap water is known for high TDS.

How worried should I be? Would do weekly water changes with RODI combat the ghosts in the closet or is it inevitable defeat?

TIA

 

[Kipp's Corals]

Could be biased information. Only true way to tell is to perform the tests yourself.
Could be true, could be false. I am still new but wondering if there is some real competition

 

[Hoxie]

I really want to believe that it is, but lets say its not....

 

[The_Paradox]

RODI still has TDS in it. Not saying one way or another what it is but not unlikely that they just have burned media.

 

[WalkerLoves_TheOcean]

There is a cheap tds meter in Amazon, that is pretty accurate. I will link it below.

TDS Meter Digital Water Tester, DUMSAMKER Professional 3-in-1 TDS, Temperature and EC Meter with Carrying Case, 0-9999ppm, Ideal ppm Meter for Drinking Water, Aquariums and More https://a.co/d/eL7FP29

 

[FUNGI]

buy some and then return next day with a sample and ask same LFS to test...see what they say.

 

[crabgrass]

Like others said, go ahead and test. TDS meters aren’t too expensive.

I had algae issues in my 20g, and only used my LFS mixed salt. I never tested their RO (should have). I did a series of rip cleans and never fixed the issue (but kept putting their salt in). New tank, I just went in with my RO water, and mixed my own salt. Lots of diffenr variables, but algae situation is much different. I am tempted to go back and just get a gallon of their RO to test