how to check your water is pure

[CoralWealth]

How do you guys check to make sure your RO/DI is completely pure.

Do you only use a handheld TDS? I have only used that and it always reads 0 but if it does hit 1, then I change the filters. However I am getting nervous that chlorine or something else is getting past the RO/DI what tests do you guys use to check for this and what levels are deadly?

I greatly appreciate any insight to this. I am wondering because I continue to have great color in new coral with stable params but then randomly around the 2-3 week mark then get burnt tips and look bad even with very stable alk at 7.5-8, p04 at 0.02-0.05 and nitrate between 5-10 so it is very strange and I am trying to find a solution.

 

[Marlon2024]

If your afraid chlorine is getting past which I highly doubt you can always add water conditioner. I use a hand tds

 

[jenkinscrew2578]

I use an inline TDS meter. I add PRIME to my RODI water every time.

 

[Randy Holmes-Farley Verified Community Expert]

If you are concerned about chlorine or chloramine in the output, you can get a cheap chlorine kit and test it. Nothing fancy is needed, and nothing else is generally worth testing for.

Otherwise, 0 ppm TDS water will be fine, assuming the device is working. Some minor amounts of some things may get through, but are not generally a concern.

 

[CoralWealth]

If you are concerned about chlorine or chloramine in the output, you can get a cheap chlorine kit and test it. Nothing fancy is needed, and nothing else is generally worth testing for.

Otherwise, 0 ppm TDS water will be fine, assuming the device is working. Some minor amounts of some things may get through, but are not generally a concern.

Thanks! any suggestions on a kit? everyone I have seen that actualy has good reviews is like $40+

 

[sublime250]

Randy Holmes-Farley

I have 120 ppm coming from the tap and I'm getting it down to 20ppm with a commercial ro machine.

What should I be concerned about in that last bit?

Is it enough to worry about? I know everyone's waters different but to get the amount of DI I'd need would be expensive

 

[Randy Holmes-Farley Verified Community Expert]

Randy Holmes-Farley

I have 120 ppm coming from the tap and I'm getting it down to 20ppm with a commercial ro machine.

What should I be concerned about in that last bit?

Is it enough to worry about? I know everyone's waters different but to get the amount of DI I'd need would be expensive

I'd be most concerned about copper, but I don't think you can useful to test that yourself (although if you detected any with a kit, its likely too much).

 

[Randy Holmes-Farley Verified Community Expert]

Thanks! any suggestions on a kit? everyone I have seen that actualy has good reviews is like $40+

If you are using a good RO/DI, the chance of having any is low. I'd start with the cheapest kit available. You don't really care to quantify. Yes/no is good enough. Maybe LaMotte test strips, although I've not used them.

 

[CoralWealth]

If you are using a good RO/DI, the chance of having any is low. I'd start with the cheapest kit available. You don't really care to quantify. Yes/no is good enough. Maybe LaMotte test strips, although I've not used them.

Thank you. What addition would be best to make sure I am getting everything out of the tap water from my RO/DI. Would another carbon block canister be best or another DI canister? Right now I just have the Spectrapure ro/di 90 gpd but I am thinking I wanna add another canister or maybe add a carbon and another DI to make sure I am putting completely pure water in my tank.