Water question maybe a dumb question

[singold]

Do I need to add dechlorinator to the RO water that already has salt mixed in that i got from LFS before adding to tank or is that already taken care of. I wanted to be 100% sure before adding to tank.

[kfisc]

No-

[abulgin]

No, the RO membrane will remove all the chorine/chloramine so the dechlorinator isn't necessary.

[singold]

Thanks

[tmz]

The ro water is void of chlorine. The carbon filter removes it before it gets to the membrane or it would damage the membrane.

[Playa-1]

No need for the dechlorinator, You should be good to go.

[snorvich]

As good practice, you might consider measuring the salinity of water you get from an LFS. And ideally you should measure this with a calibrated refractometer. Some LFS give water that is low on salinity in order to save on salt mix.

[otrlynn]

+1 on snorvich's advice. Measure the salinity of the water from the LFS, I have purchased water that ranged from 1.019 to 1.026, that I was told was mixed up to 1.023.

[jimbo78]

<a href=showthread.php?s=&postid=12730568#post12730568 target=_blank>Originally posted</a> by snorvich
As good practice, you might consider measuring the salinity of water you get from an LFS. And ideally you should measure this with a calibrated refractometer. Some LFS give water that is low on salinity in order to save on salt mix. good point. The store I get it from I usually high. Like 1029.

[sassafrass]

Also with salt already added from the LFS there is no way to tell how pure the water is ,remember it doesn't pay to change filters often! I went to a drinking water store that claimed pure water with my TDS meter it measured 256 TDS !! I didn't expect 0 TDS but 256 is .
Lee

[jimbo78]

Yeah the tds at the machine at the local supermarket was lower than my lfs

[tmz]

<a href=showthread.php?s=&postid=12731784#post12731784 target=_blank>Originally posted</a> by jimbo78
Yeah the tds at the machine at the local supermarket was lower than my lfs Are we talking about ro water or mixed salt water.? TDS readings of salt water are irrelevant.BTW if your water reads higher sg than your lfs thinks it is,the inaccuracy of a hydrometer could account for the difference, So if you think it's too high check your hydometer against another measuring device. Precision in salinity measurement in this hobby is best achieved with a well calibrated refractometer. or conductivity meter. Hydrometers vary from unit to unit and at best give a general idea of sg.

[tush]

<a href=showthread.php?s=&postid=12730568#post12730568 target=_blank>Originally posted</a> by snorvich
As good practice, you might consider measuring the salinity of water you get from an LFS. And ideally you should measure this with a calibrated refractometer. Some LFS give water that is low on salinity in order to save on salt mix.

+2 on this one - my LFS gave me RO one time instead of premix - honest mistake but could have been disaster!

[Randy Holmes-Farley]

I presume that an LFS will not sell RO water if the water supply uses chloramine, but if it does, then there is a problem with ammonia in the water that a treatment for ammonia (like Amquel) might help solve.

The problem does not relate to RO/DI water as the DI binds the ammonia. :)