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#176
10/13/2007, 11:05 AM
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______________________________ Colorado is sweet. I'm always down to go to the MJ My Turbo Honda -> Click little red house. Friends don't let friends buy from Front Range Aquatics |
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#181
10/24/2007, 08:18 AM
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Just a FYI to see where it compares.. someone on another board sent in some freshly mixed HW Marinemix to AWT to be tested (already mixed by the person).
Results; (sg 1.023) Ammonia (NH3-4) 0.100 High Nitrite (NO2) 0.003 Good Nitrate (NO3) 0.2 Good Phosphate (PO4) 0.55 High Silica (SiO2-3) 4.5 High Potassium (K) 356 Good Calcium (Ca) 434 Good Boron (B) 4.4 Good Molybdenum (Mo) 0.1 Good Strontium (Sr) 8.8 Good Magnesium (Mg) 1207 Good Iodine (IŻ) 0.02 Low Copper (Cu++) 0.05 High Alkalinity (meq/L) 3.05 Good Last edited by King-Kong; 10/24/2007 at 08:23 AM. |
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#185
10/24/2007, 08:31 AM
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#186
10/24/2007, 09:49 AM
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So far every test result I've seen posted here has come back from AWT with very high silica levels many times NSW levels, including my own test. I was quite surprised my silica tested so high at AWT because my water runs through 3 seperate semiconductor grade DI cartridges and I use Seachem Reef Salt which I don't believe contains that much silica if any. I have since had Jim at The Filter Guys make me up a 100% silica removing cartridge to add to my RO/DI setup so I'll see what happens next time I send in a sample.
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Florida Live Rock Addict. Last edited by HowardW; 10/24/2007 at 09:56 AM. |
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#187
10/24/2007, 09:53 AM
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I sent my first sample into AWT on Monday. How long does it typically take for you to get your results?
I have a (Red Sea I think) Silica test and tested it Monday as well. I'll post my Silica results as soon as I get them.
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-Chris |
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#188
10/24/2007, 09:56 AM
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#189
10/24/2007, 09:58 AM
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Well I just signed up for the monthly testing, I have always wanted to find a service like this!
I think they may be a division of the company that sells aqua medic in loveland, hopefully its a legit deal. Since I live about 2 hours from there i may have to shoot up there and check them out. I'll post a link in the denver forum and see if anyone up there can swing by and check out the place. Chris
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People without reef tanks are so smart! Listen to them and you will learn so so much..... |
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#190
10/24/2007, 10:00 AM
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#191
10/24/2007, 10:12 AM
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#192
10/24/2007, 01:20 PM
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The silica is probably coming form the salt mix and not the RO/DI. But I doubt the salt mix also as most only put out about .5 ppm. I think they are in error or somehow your tanks are accumulating more silica than we think . Using GFO or activated alumina should drop them to zero.
Silica (SiO2-3) This is as silicate, i.e., SiO2 and SiO3 and ot actual silica. NSW has about 3 ppm Silica and that equates to 6.2 ppm Silicate, i.e SiO2. You have to add the oxygen to it. Something I missed on this issue earlier and should have explained  We need to be careful when giving ion concentrations. For example, you may see sulfate given as S or as Sulfate in books or articles. It is usually found as Sulfate, SO4 and is often given that why but some give it as S, which will be much lower. NSW S = 905 ppm and SO4 = 2715 ppmAnd their tests may be measuring insoluble silica particles also ("dust" ) which will skew the results making them higher. Something to look at. They say Silica (Sio2-3) Natural Seawater Value: 0.040 mg/l Acceptable Range: 0.000 to 0.500 mg/l Silica is often given as 3 ppm but can be as low as 0 .040 and I think they are giving your tests as Silicate and not Silica, but show silica above. As I said above 3 ppm Silica equates to 6.2 ppm Silicate.. The oceans avg is 100 uM form an oceanographic web site 100 x 28.066 = 2.8066 ppm Si. Adding the O2 for SiO2 = 2.14 x 2.8 = 5.99 ppm SiO2 NSW or 2.8 ppm Si. So you guys are IMHO within normal NSW range. Maybe I should call them and straighten them out Something to look at Silica in a Reef Tank http://advancedaquarist.com/issues/jan2003/feature.htm |
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#193
10/26/2007, 10:58 PM
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Ok -- I got my results, as posted here
This is an IO/RC mixture from my DT (not freshly mixed SW): Ammonia (NH3-4) 0.004 Good Nitrite (NO2) 0.009 Good Nitrate (NO3) 2.5 Good Phosphate (PO4) 0.04 Good Silica (SiO2-3) 3.6 High Potassium (K) 355 Good Calcium (Ca) 493 High Boron (B) 3.7 Good Molybdenum (Mo) 0.3 High Strontium (Sr) 10.3 Good Magnesium (Mg) 1239 Good Iodine (IŻ) 0.04 Good Copper (Cu++) 0.03 Good Alkalinity (meq/L) 3.12 Good The silica is much higher (36x) what my Red Sea test gave me. I'm going on week 11 of diatoms (tank was started in early August) though so I'm almost inclined to believe AWT over the Red Sea kit. Boomer -- Did you contact AWT regarding whether or not they are giving us silicate or silica test results? DrBegalke -- What's the word? Should we abandon hope on this yet? For those of us who have received results from AWT, it will certainly help us rule out salt as an issue -- right now I'm torn between wondering whether or not my salt is contributing to silica/molybdenum or if I need a new RO/DI unit!
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-Chris |
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#194
10/26/2007, 11:21 PM
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I believe they are testing for all available silicates, not just silica, which is why the readings show high when comparing to desirable values of silica.
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#195
10/27/2007, 09:41 AM
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#196
10/27/2007, 08:02 PM
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Jmille501
First post gets you a big [welcome] |
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#197
10/28/2007, 01:31 AM
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Hey Boomer and all others this has a lot of people running around wildly. I Just wanted to address the from an RO/DI prospective. I have tons of people contacting me who have done the water report and have high silica. The silica reading seems to be a biggie but no one seems to know the silica reading for their tap water. This should be available from their municipal water supplier and is a good place to start.
The high S membrane recommended is also misleading and one of the best all around membranes for silica rejection is going to be the Filmtec. Silica is a charged ion and DI resin is very effective in the after RO membrane removal. Special Anion cartridges can be produced which target silica if needed and just added with an additional housing inline with regular DI cartridges or a high silica blended cartridge is also available. A zero tds reading of product water should indicate silica removal. This brings us to the casual water maker who allows the tds of exhausted DI resin to climb above two to three. Exhausted DI resin will throw back stripped tds at a higher rate then stripped and produce poor quality water. The could account for some elevated readings. Poor RO/DI maintance creates peaks and valleys in water quality which should be avoided at all cost. Also operating an RO/DI system without a tds meter is fool hardy and a guessing game at best. I did not read the whole thread and am just responding to the many calls and e-mails I'm getting questioning RO/DI water as the source of the silica as suggested by the testing company. Jim
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RO/DI Supplies & parts www.thefilterguys.biz 218 724-8000 Last edited by Thefilterguys; 10/28/2007 at 02:10 AM. |
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#198
10/28/2007, 02:24 AM
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 The high S membrane recommended is also misleading and one of the best all around membranes for silica rejection is going to be the Filmtec. Yes, it is I agree on almost all of that of what you said. However, silica is hardly charged at all and often is not charged at all but there are special DI's for silica. Silica should be kept at no higher than 1 ppm or even less. I think there is something very wrong with their Silica results and have said so a number of times on the AWT threads  You should see my last post on RO's Jim. See " My AWT test" thread. PS Already have my MACNA room and our IMAC room for next year  I found out Chicagoland will be flooded with conferences next year when we go, so I jumped on it already
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If you See Me Running You Better Catch-Up An explosion can be defined as a loud noise, accompanied by the sudden going away of things, from a place where they use to be. |
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#200
10/28/2007, 11:23 AM
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Sorry I didn't read the entire thread before posting I was linked to this thread by one of the posters on my forum. I also suspected salt mixes and did a little research with no results.
For those who have high silica in their tap water I may recommend adding a pure Anion silica cartridge as a polishing cartridge along with their regular DI cartridge. I have recommended taking no action as the high silica is already present and overreaction can sometimes have bad results. I consider removing perfectly good membranes and DI cartridges a waste untill we have more background. As always I see you and other people are on top of things. Jim
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RO/DI Supplies & parts www.thefilterguys.biz 218 724-8000 |
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