Go Back   Aquarium Advice - Aquarium Forum Community > General Aquarium Forums > General Hardware/Equipment Discussion
Click Here to Login

Join Aquarium Advice Today
Reply
 
Thread Tools Search this Thread Display Modes
Please support our sponsors and let them know you heard about them on AquariumAdvice.com
 
Old 03-07-2008, 09:45 AM   #11
Aquarium Advice Freak
 
Join Date: Feb 2006
Posts: 496
Hey,

Just got my RO/DI last night from Air, Water & Ice. I plan on using it for both FW and SW. I'll bypass the DI filter for FW use. Our well water is very hard 15GH/8.5 PH.

Our test kit recomends R/O treatment to lower these numbers. It makes sense to me.

Dave
__________________

__________________
Creamhorses is offline   Reply With Quote
Old 03-07-2008, 09:56 AM   #12
Aquarium Advice Freak
 
Join Date: Jan 2008
Location: Tired of the mod power plays; gone to another forum
Posts: 267
From wetwebmedia:

I have read that you should not put RO water in freshwater tanks, then some articles saying you should?
<The idea is that you should not use untreated RO water, as there is no mineral content. There are several buffering powders specifically for freshwater tanks that can achieve this. Another method, which I personally employ, is to use 2/3 RO waste water to 1/3 RO water for my freshwater tanks. The RO waste is dechlorinated already, and it cuts down on the wasted water!>

and suggests using something like this:
Search Results for electro right

Through all the discussions here regarding Ro/DI, I don't think I ever saw any reference to not using for FW
__________________

__________________
tawolcott is offline   Reply With Quote
Old 03-07-2008, 12:45 PM   #13
AA Team Emeritus
 
Ziggy953's Avatar



POTM Champion
Tank of the Month Award
 
Join Date: Feb 2006
Location: Owings Mills, Maryland
Posts: 9,101
RO/DI water is 99.9% pure water. H2O and nothing else. I have a 55g FW planted tank that I refill and do water changes right out of the tap. I use my RO/DI for my SW tanks only. I put the elements and nutirents in the water via the salt mix. Fish and plants need elements to live so if you are using RO/DI water in a FW tank you are going to have to supplement the water in some way. I have no idea what that is but I'm sure there are products out there to do it.

SW - RO/DI
FW - TAP (treated if you have chlorine in your water)
Ziggy953 is offline   Reply With Quote
Old 03-07-2008, 04:01 PM   #14
Aquarium Advice FINatic
 
Join Date: Jan 2004
Location: Erie, CO
Posts: 681
Quote:
Originally Posted by Creamhorses View Post
Hey,

Just got my RO/DI last night from Air, Water & Ice. I plan on using it for both FW and SW. I'll bypass the DI filter for FW use. Our well water is very hard 15GH/8.5 PH.

Our test kit recomends R/O treatment to lower these numbers. It makes sense to me.

Dave
In your case I suggest playing around with your test kits one day.

Start from a 50-50 mix of RO/DI water and well water. Run the PH and GH/KH tests on this mix...adjust the percentage mix until you hit the numbers you want and remember this mixture for future water changes.

As others mentioned if you use RO/DI water (or even just RO water) you will have to "dose" some of the minerals and the like back into the water. If you want to strictly control what goes into your water (running a science experiment for one of your children's school science projects perhaps?) then go ahead. If you have extremely hard water than use a mixture. If neither case applies I would advise against it...Just the use of an absorbtive media like Purigen was pulling too much stuff out of the water for my plants to grow healthy (though I did not see any adverse effects for the animals).
__________________
patryuji is offline   Reply With Quote
Old 03-07-2008, 04:27 PM   #15
SW REEF 18+ YEARS
Community Admin
 
melosu58's Avatar



Tank of the Month Award
 
Join Date: Oct 2004
Location: Virginia
Posts: 38,244
I use RO/DI for my 2 planted tanks (FW). Our county has a warning for our water "not for aquarium use". I also use for my SW tanks too.
__________________

SITE ADMINISTRATOR

You can view many of my fish and corals in my photo albums in my profile.

View my tank


AA Community Rules|AA TOS

Forums 101 - posting, accounts, basics
melosu58 is offline   Reply With Quote
Old 03-07-2008, 06:38 PM   #16
Aquarium Advice Freak
 
Join Date: Feb 2006
Posts: 496
Patryugi
__________________
Creamhorses is offline   Reply With Quote
Old 03-07-2008, 06:59 PM   #17
Aquarium Advice Freak
 
Join Date: Feb 2006
Posts: 496
Patryugi

I like that idea of mixing tap & RO to come up with a comprimise of chemicals for FW use. Our area [region] is high in limestone deposits, which contributes to our high ph. I don't know what causes the hardness.

Is there an ideal for ph & GH, or do you tweak paramiters to suit your needs? For instance, we've never been able to keep discus. Is it realistic to manufacture water which these fish will thrive in?

Dave
__________________
Creamhorses is offline   Reply With Quote
Old 03-07-2008, 07:19 PM   #18
Aquarium Advice Freak
 
Join Date: Jan 2008
Location: Tired of the mod power plays; gone to another forum
Posts: 267
It's really neither of those things. For some time I've read on here about the advantages of ro/di. One might even say that the majority of posts on the simply say that's all you should use. That I can remember, I never saw a post making a distinction between FW and SW, nor anything on dosing essentials that are removed. Even from the get-go of this post , which was just a question of if I should mix the 2 for awhile to ease into the 'new' water the answers were just do the switch.

I never gave it a second thought until someone mentioned not to use it for FW; the I went looking to validate the statement. So, no it's not a science experiment, I don't want to 'play w/ my numbers.

However if you consider your time to be worth something I would wonder what the true cost benefit number is for the ro/di filter once you factor in dosing, testing, mixing time and costs. For FW it sure isn't filter the water - use the water as compared to using bottled water as I do now which is open the 5g jug and siphon in.

Too late for me now, as I've already made the plunge so I'll use it for both FW and SW regardless.

For others when the ro/di discussion is broached, it might be useful to make the distinction before recommending it.

And for the record, it was Bob Fenner over at wetwebmedia whose posting first recommended mixing the two first in this thread. Credit where credit is due
__________________
tawolcott is offline   Reply With Quote
Old 03-07-2008, 07:39 PM   #19
AA Team Emeritus
 
Ziggy953's Avatar



POTM Champion
Tank of the Month Award
 
Join Date: Feb 2006
Location: Owings Mills, Maryland
Posts: 9,101
Well for what it's worth I started my SW tank out with RO/DI water, I use it to mix with and I use it for my top off. My FW tank I just use water right out of the tap (I'm on well water and it is prestine).

If you want to read about a situation using a de-chlorinator on a SW tank go to oregonreef.com and read about what happened to this amazing 800gallon reef.

I'll stick with RO/DI water 100%
Ziggy953 is offline   Reply With Quote
Old 03-08-2008, 12:34 PM   #20
AA Team Emeritus
 
cmor1701d's Avatar


 
Join Date: Feb 2003
Location: Belle Mead, NJ
Posts: 7,814
From Drs. Foster and Smith
"Reverse osmosis removes virtually everything from tap water, including essential minerals your aquarium inhabitants need to flourish. Depending on the type of aquarium the RO water is being used for, it may be necessary to add these essential minerals back into the purified water...However, freshwater aquariums require re-mineralization to achieve the desired pH. . . .

In some areas, especially in regions that have limestone deposits, well water will contain high levels of minerals, making the water "hard." Water hardness is closely associated with pH and influences the ease at which pH can be altered. The high mineral content functions as a buffer and counteracts the effects of pH conditioners.
In order for pH conditioners to work properly, the minerals must first be removed from the source water. The most effective way to do this is through the use of a reverse osmosis unit. They can remove up to 99% of the minerals and other impurities in your water."


Try a Google search on "RO water in a fresh water aquarium" for more sites with similar information.
__________________

cmor1701d is offline   Reply With Quote
Reply

Tags
ro/di

Please support our sponsors and let them know you heard about them on AquariumAdvice.com

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off








» Photo Contest Winners








Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -4. The time now is 07:32 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.