Water question maybe a dumb question

singold · 06/11/2008, 10:01 PM

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 · 06/11/2008, 10:02 PM

No-

abulgin · 06/11/2008, 10:03 PM

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

singold · 06/11/2008, 10:05 PM

Thanks

tmz · 06/12/2008, 01:07 AM

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 · 06/12/2008, 06:14 AM

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

snorvich · 06/12/2008, 07:08 AM

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 · 06/12/2008, 09:21 AM

+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 · 06/12/2008, 09:45 AM

Quote:

Originally posted 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 · 06/12/2008, 10:28 AM

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 · 06/12/2008, 10:38 AM

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

tmz · 06/12/2008, 01:35 PM

Quote:

Originally posted 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 · 06/12/2008, 01:40 PM

Quote:

Originally posted 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 · 06/12/2008, 03:46 PM

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.

06/11/2008, 10:01 PM	#1
singold Registered Member Join Date: May 2008 Location: Lake Saint Louis, Missouri Posts: 1,827	Water question maybe a dumb question 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.

06/11/2008, 10:05 PM	#4
singold Registered Member Join Date: May 2008 Location: Lake Saint Louis, Missouri Posts: 1,827	Thanks __________________ "If there is no wind.....row." Current Tank Info: 75gal Reef w/29gal Refugium

06/12/2008, 01:07 AM	#5
tmz ReefKeeping Mag staff Join Date: Apr 2006 Location: West Seneca NY Posts: 27,691	The ro water is void of chlorine. The carbon filter removes it before it gets to the membrane or it would damage the membrane. __________________ Tom Current Tank Info: Tank of the Month , November 2011 : 600gal integrated system: 3 display tanks (120 g, 90g, 89g),several frag/grow out tanks, macroalgae refugia, cryptic zones. 40+ fish, seahorses, sps,lps,leathers, zoanthidae and non photosynthetic corals.

06/12/2008, 07:08 AM	#7
snorvich Team RC member Join Date: Aug 2005 Location: Outlander Posts: 40,953 Blog Entries: 46	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. __________________ Warmest regards, ~Steve~

06/12/2008, 09:21 AM	#8
otrlynn Registered Member Join Date: Aug 2007 Location: Chester County PA Posts: 1,508	+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. __________________ Lynn 1 horse, 1 dog, 2 cats, small pond with a few koi. The fish tank is gone.

06/11/2008, 10:02 PM	#2
kfisc Registered Member Join Date: Nov 2003 Posts: 2,020	No-

06/11/2008, 10:03 PM	#3
abulgin Registered Member Join Date: Jul 2007 Location: Baltimore, MD Posts: 2,664	No, the RO membrane will remove all the chorine/chloramine so the dechlorinator isn't necessary.

06/12/2008, 06:14 AM	#6
Playa-1 Moved On Join Date: Jun 2007 Location: Laguna Niguel, CA Posts: 7,497	No need for the dechlorinator, You should be good to go.

06/12/2008, 10:28 AM	#10
sassafrass Registered Member Join Date: Dec 2005 Location: capitola ca Posts: 1,729	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

06/12/2008, 10:38 AM	#11
jimbo78 Registered Member Join Date: May 2007 Location: miami Posts: 3,099	Yeah the tds at the machine at the local supermarket was lower than my lfs __________________ Dive with sharks? Doesn't everyone. Current Tank Info: 60 cube

06/12/2008, 03:46 PM	#14
Randy Holmes-Farley Reef Chemist Join Date: Apr 2001 Location: Arlington, Massachusetts Posts: 86,233	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. __________________ Randy Holmes-Farley Current Tank Info: 120 mixed reef