RODI from LFS

kiddbid · 10/18/2014, 02:29 PM

I get my RODI from one of our LFS that I use to top off about a gallon a day. A few weeks ago I noticed my nitrates going steadily up so I started 10% changes weekly and cut the feedings. Nitrates still going up so I bought a different test kit. My nitrates are above the limits on both the API and RS Pro tests. I then did a 20% change and tested directly after. The nitrates are still high so I tested my RODI and, you guessed it, same readings. Nitrates are high from all bottles of RODI.

I then brought the RODI to the LFS who confirmed the reading. They tested the water directly from their unit and also found even higher nitrates reading. Naturally they need to change their membranes which they say will take a week. Naturally, I'm currently looking for a new source of RODI.

My question is this; should I do a large water change or multiple water changes and if so what percentages do you suggest?

Thank you.

gone fishin · 10/18/2014, 03:21 PM

If you just have fish then multiple WC should do the trick once you get some good water. Generally fish can tolerate higher levels of Nitrates.

FWIW you may want to look into getting your own RO/DI setup they are relatively cheap. Then you have control of your water.

uncleL · 10/18/2014, 03:31 PM

GET YOUR OWN RO/DI UNIT!!!!!! Save yourself the trouble!!

kiddbid · 10/18/2014, 03:31 PM

Thanks Tony,
The few corals I have in there have not been doing well this past month and now I think I know why.

gone fishin · 10/18/2014, 03:49 PM

yeah high nitrates can get them into a snit. Depending on the size of your tank you could get yourself some distilled water from the grocery store to help get them down.

SpectraPure · 10/30/2014, 01:59 PM

Once the DI has exhausted only replacing a new membrane will not solve your problem. I would recommend changing the DI, and also if it has been a while for the sediment and carbon, those should be changed as well.

On your system you have a flow restrictor. This is what regulates the waste-to-product ratio. If you do not waste enough water you will experience problems. Soft or softened water can be run at 2:1 with either a manual or automatic flush on the system. Hard water requires 3:1, 4:1, or 5:1 depending on the general hardness of the water.

There is much more involved.

If you need any help optimizing your system for maximum performance please let me know.

Jeremy
Support@spectrapure.com

10/18/2014, 02:29 PM	#1
kiddbid Registered Member Join Date: Jul 2014 Location: Suffolk County, NY Posts: 27	RODI from LFS I get my RODI from one of our LFS that I use to top off about a gallon a day. A few weeks ago I noticed my nitrates going steadily up so I started 10% changes weekly and cut the feedings. Nitrates still going up so I bought a different test kit. My nitrates are above the limits on both the API and RS Pro tests. I then did a 20% change and tested directly after. The nitrates are still high so I tested my RODI and, you guessed it, same readings. Nitrates are high from all bottles of RODI. I then brought the RODI to the LFS who confirmed the reading. They tested the water directly from their unit and also found even higher nitrates reading. Naturally they need to change their membranes which they say will take a week. Naturally, I'm currently looking for a new source of RODI. My question is this; should I do a large water change or multiple water changes and if so what percentages do you suggest? Thank you.

10/18/2014, 03:21 PM	#2
gone fishin Registered Member Join Date: Jul 2011 Location: Wyocena Wi Posts: 6,936	If you just have fish then multiple WC should do the trick once you get some good water. Generally fish can tolerate higher levels of Nitrates. FWIW you may want to look into getting your own RO/DI setup they are relatively cheap. Then you have control of your water. __________________ Tony Current Tank Info: 180gal DT, BM NAC77 skimmer,3 Maxspect razors, Maxspect Gyre 150, 30g QT

10/18/2014, 03:49 PM	#5
gone fishin Registered Member Join Date: Jul 2011 Location: Wyocena Wi Posts: 6,936	yeah high nitrates can get them into a snit. Depending on the size of your tank you could get yourself some distilled water from the grocery store to help get them down. __________________ Tony Current Tank Info: 180gal DT, BM NAC77 skimmer,3 Maxspect razors, Maxspect Gyre 150, 30g QT

10/30/2014, 01:59 PM	#6
SpectraPure RC Sponsor Join Date: Jun 2003 Posts: 0	Once the DI has exhausted only replacing a new membrane will not solve your problem. I would recommend changing the DI, and also if it has been a while for the sediment and carbon, those should be changed as well. On your system you have a flow restrictor. This is what regulates the waste-to-product ratio. If you do not waste enough water you will experience problems. Soft or softened water can be run at 2:1 with either a manual or automatic flush on the system. Hard water requires 3:1, 4:1, or 5:1 depending on the general hardness of the water. There is much more involved. If you need any help optimizing your system for maximum performance please let me know. Jeremy Support@spectrapure.com __________________ *Innovators in water technology.* Since 1985!

10/18/2014, 03:31 PM	#3
uncleL Registered Member Join Date: Sep 2014 Location: NC Posts: 411	GET YOUR OWN RO/DI UNIT!!!!!! Save yourself the trouble!!