Nitrates in Top Off Water

dwsindy · 01/06/2007, 02:55 PM

I am using DI water for top off's and water changes and have been fighting a nitrate problem. Today I checked the water from my DI and measured 2ppm of Nitrate. I don't believe I should be reading any Nitrates. Is my assumption correct? I have new filters ordered for the RO/DI unit and they should be here Monday. I am using Salifert test kits btw. Here is all of my parameters measured today:

no3= 10
n02= 0
nh3= 0
cal= 390
kh/alk= 3.43
ph= 8.1
sg= 1.0265
temp= 78.6
mg= 1125
po4= 0

O'Man · 01/06/2007, 03:48 PM

You might want to test your water before the RO/DI unit to see how effective it really is.

dwsindy · 01/06/2007, 03:59 PM

Good point. I will check nitrates from tap now. but I do know the RO/Di is working as my TDS is 0 out of DI and around 3 or 4 out of RO. I have had this unit for a year now.

drummereef · 01/06/2007, 03:59 PM

Sounds like you are getting the replacement media just in time.

Do you test the tds of the RO/DI water? I would test both the RO stage and the DI stage seperately.

dwsindy · 01/09/2007, 07:28 PM

I just thought I should update on the nitrates. I received my replacement filters yesterday. I hooked them up and flushed a couple of gallons of DI water and then checked the nitrates and they are now 0. Time for a water change now!!

01/06/2007, 02:55 PM	#1
dwsindy Premium Member Join Date: Dec 2004 Location: Indianapolis Posts: 218	Nitrates in Top Off Water I am using DI water for top off's and water changes and have been fighting a nitrate problem. Today I checked the water from my DI and measured 2ppm of Nitrate. I don't believe I should be reading any Nitrates. Is my assumption correct? I have new filters ordered for the RO/DI unit and they should be here Monday. I am using Salifert test kits btw. Here is all of my parameters measured today: no3= 10 n02= 0 nh3= 0 cal= 390 kh/alk= 3.43 ph= 8.1 sg= 1.0265 temp= 78.6 mg= 1125 po4= 0

01/06/2007, 03:59 PM	#4
drummereef Team RC Member Join Date: Jul 2006 Location: STL Posts: 14,754	Sounds like you are getting the replacement media just in time. Do you test the tds of the RO/DI water? I would test both the RO stage and the DI stage seperately. __________________ -Brett 180g Marineland Starfire In-Wall 278 gallon system

01/06/2007, 03:48 PM	#2
O'Man 10 & Over Club Join Date: Feb 2000 Location: USA Posts: 838	You might want to test your water before the RO/DI unit to see how effective it really is.

01/09/2007, 07:28 PM	#5
dwsindy Premium Member Join Date: Dec 2004 Location: Indianapolis Posts: 218	I just thought I should update on the nitrates. I received my replacement filters yesterday. I hooked them up and flushed a couple of gallons of DI water and then checked the nitrates and they are now 0. Time for a water change now!!