High Alk?

[cwb_reeftank]

I'm not I don't have a RODI unit I get my water from a lfs

 

[Randy Holmes-Farley Verified Community Expert]

I'm not I don't have a RODI unit I get my water from a lfs

I'd want some assurance of the quality, like measuring the TDS myself, or seeing them measuring it at the store. Tap water can certainly have substantial alkalintiy in it. If you are confidence in the alk test on the LFS "pure water", I wouldn't use it.

 

[cwb_reeftank]

so what should I do about the water having that high of alk?

 

[Randy Holmes-Farley Verified Community Expert]

so what should I do about the water having that high of alk?

You mean the tank itself? I’d probably let it decline on its own unless corals appear to be suffering.

 

[cwb_reeftank]

They look like they are but also the rodi water?

 

[Randy Holmes-Farley Verified Community Expert]

I’d stop using RO/ DI water that had detectable alkalinity in it.

 

[cwb_reeftank]

Do they sell rodi water at Walmart or something like that? Because I don't have any other source for rodi water

 

[cwb_reeftank]

like would distilled water be good to use?

 

[Randy Holmes-Farley Verified Community Expert]

like would distilled water be good to use?

Usually, distilled water is fine.

 

[cwb_reeftank]

Ok I'll get some this weekend and see what it test at and go from there also I should be getting my new reagent this week as well

 

[cwb_reeftank]

Ok I have the new reagent from Hanna and I used it to test the distilled water I got today and it read as 0 dKH and when I mixed my salt it came up at 8.6 dKH, which is where it normally is so I think I found my problem.

 

[Randy Holmes-Farley Verified Community Expert]

Ok I have the new reagent from Hanna and I used it to test the distilled water I got today and it read as 0 dKH and when I mixed my salt it came up at 8.6 dKH, which is where it normally is so I think I found my problem.

Sounds good.

Happy reefing. :)

 

[cwb_reeftank]

Well I test my tank water and it was 11.8 so in Friday I'm doing a 20 gallon water change and see if that will bring the tank water back to normal and thanks for all of your help [emoji4]