Ro Tds

steve_karen · 06/06/2006, 05:55 PM

I just bought a gallon of RO water from my lfs just so I could test it for TDS. It tested 79. Is that too high? If so I will probably start off with distilled as I have tested it and it was 0. I'll get an RO/DI system in a few months.

shoddyk · 06/06/2006, 05:57 PM

Did you flush the system for about an hour before testing the water?

RobbyG · 06/06/2006, 06:02 PM

79 !!! Wow thats like straight Tap water. Don't fly off the handle till you confirm it with someone elses meter but if it really is 79 you need to talk to the LFS owner.

bertoni · 06/06/2006, 06:02 PM

There are two issues involved. The first is the quality of the RO setup at the fish store, and the second is the method of storage after purification. You might be seeing either problem. I think some storage containers can leach ions into the water, but they aren't considered harmful. The chemistry forum is probably a better resource for that issue.

shoddyk · 06/06/2006, 06:03 PM

I'm an idiot, I didn't read the whole post. I thought the water was from your RO filter. Sorry

smcdonn · 06/06/2006, 06:29 PM

My tap water is 80. My ro water is 7, and my ro/di water is 0. Even a crappy ro/di system should be able to pull water under 20 or so. I would talk with the owner of the store.

AZDesertRat · 06/06/2006, 07:52 PM

What did you put the water in to bring it home? The container is probably a large contributor. Unless it has been used for nothing but RO or DI its probably dirty and the clean water is attracting whatever is in the bottle. See if the LFS will test the water straight out of the RO for you.

06/06/2006, 05:55 PM	#1
steve_karen Registered Member Join Date: May 2005 Location: cincinnati, ohio Posts: 188	Ro Tds I just bought a gallon of RO water from my lfs just so I could test it for TDS. It tested 79. Is that too high? If so I will probably start off with distilled as I have tested it and it was 0. I'll get an RO/DI system in a few months.

06/06/2006, 06:02 PM	#3
RobbyG Registered Member Join Date: Jun 2005 Location: 600 Ft From the Reef Posts: 2,099	79 !!! Wow thats like straight Tap water. Don't fly off the handle till you confirm it with someone elses meter but if it really is 79 you need to talk to the LFS owner. __________________ The Optimist says the glass is half full, the Pessimist says it’s half empty, an engineer only see's a glass that’s twice as big as it needs to be! Current Tank Info: Insanely Automated Low Power Consumption 90 Gal Oceanic Bow System/Aquatronica Touch Controller/AQ Dosing Pump/AQT LEDS/AQ SMS/Seq Dart Pump/ASM G3/Ozotech Ozonizer/Koralin 1502/Chiller/Typhoon3 Ro/S.Squirt /Phos React/Rmt DSB

06/06/2006, 06:02 PM	#4
bertoni RC Mod Join Date: Mar 2002 Location: Mountain View, CA, USA Posts: 88,616	There are two issues involved. The first is the quality of the RO setup at the fish store, and the second is the method of storage after purification. You might be seeing either problem. I think some storage containers can leach ions into the water, but they aren't considered harmful. The chemistry forum is probably a better resource for that issue. __________________ Jonathan Bertoni

06/06/2006, 06:29 PM	#6
smcdonn Registered Member Join Date: Apr 2006 Location: Fayetteville, AR Posts: 925	My tap water is 80. My ro water is 7, and my ro/di water is 0. Even a crappy ro/di system should be able to pull water under 20 or so. I would talk with the owner of the store. __________________ 180g IN WALL, REEF Current Tank Info: 180 gallon

06/06/2006, 05:57 PM	#2
shoddyk Registered Member Join Date: Nov 2005 Location: Yuma, Az Posts: 568	Did you flush the system for about an hour before testing the water?

06/06/2006, 06:03 PM	#5
shoddyk Registered Member Join Date: Nov 2005 Location: Yuma, Az Posts: 568	I'm an idiot, I didn't read the whole post. I thought the water was from your RO filter. Sorry

06/06/2006, 07:52 PM	#7
AZDesertRat Moved On Join Date: Jan 2002 Location: NW Phoenix Posts: 16,621	What did you put the water in to bring it home? The container is probably a large contributor. Unless it has been used for nothing but RO or DI its probably dirty and the clean water is attracting whatever is in the bottle. See if the LFS will test the water straight out of the RO for you.