my tapwater composition. how does it look?

jahull · Jan 23, 2006

<body>

This is from a report from our municipal water company
(from this site: http://www.lbwl.com/communityimpact_WaterQuality.asp )

Anyhow, can I use this water as my main source of water, or will I be creating a sort of time-bomb as the contaminants accumulate in the tank?

<table border="1" cellpadding="2">
<tr>
<td width="50" height="18">Analyte</td>
<td width="50" height="18">Reported as mg/l 
(except as noted)</td>
<td width="40" height="18">Typical 
Concentration 
</td>
<td width="70" height="18">Range</td>
</tr>
<tr>
<td width="50">Calcium</td>
<td width="50">CaCO3</td>
<td width="40">50</td>
<td width="70">40-60</td>
</tr>
<tr>
<td width="50">Magnesium</td>
<td width="50">CaCO3</td>
<td width="40">40</td>
<td width="70">30-40</td>
</tr>
<tr>
<td width="50">Total Hardness*</td>
<td width="50">CaCO3</td>
<td width="40">90</td>
<td width="70">85-100</td>
</tr>
<tr>
<td width="50">Carbonate (CO3)</td>
<td width="50">CaCO3</td>
<td width="40">20</td>
<td width="70">15-30</td>
</tr>
<tr>
<td width="50">Bicarbonate (HCO3)</td>
<td width="50">CaCO3</td>
<td width="40">15</td>
<td width="70">10-25</td>
</tr>
<tr>
<td width="50">Total alkalinity</td>
<td width="50">CaCO3</td>
<td width="40">35</td>
<td width="70">25-60</td>
</tr>
<tr>
<td width="50">Sodium*</td>
<td width="50">Na</td>
<td width="40">44</td>
<td width="70">30-60</td>
</tr>
<tr>
<td width="50">Iron*</td>
<td width="50">Fe</td>
<td width="40">0.2</td>
<td width="70">0.1-0.5</td>
</tr>
<tr>
<td width="50">Sulfate*</td>
<td width="50">SO4</td>
<td width="40">70</td>
<td width="70">40-150</td>
</tr>
<tr>
<td width="50">Chloride*</td>
<td width="50">Cl</td>
<td width="40">46</td>
<td width="70">10-100</td>
</tr>
<tr>
<td width="50">Silica*</td>
<td width="50">SiO2</td>
<td width="40">10</td>
<td width="70">9-14</td>
</tr>
<tr>
<td width="50">Fluoride</td>
<td width="50">F</td>
<td width="40">1.2</td>
<td width="70">0.6-1.4</td>
</tr>
<tr>
<td width="50">Phosphate, Tot</td>
<td width="50">P</td>
<td width="40">0.8</td>
<td width="70">0.2-1.0</td>
</tr>
<tr>
<td width="50">Phosphate, Ortho</td>
<td width="50">P</td>
<td width="40">0.2</td>
<td width="70">0.1-0.5</td>
</tr>
<tr>
<td width="50">Chloramine</td>
<td width="50">Cl2 (at plant tap)</td>
<td width="40">2.0</td>
<td width="70">1.0-3.5</td>
</tr>
<tr>
<td width="50">pH</td>
<td width="50">pH units</td>
<td width="40">9.4</td>
<td width="70">9.2-9.8</td>
</tr>
<tr>
<td width="50">Turbidity</td>
<td width="50">NTU</td>
<td width="40">0.2 NTU</td>
<td width="70">0.1-0.5</td>
</tr>
<tr>
<td width="50">Conductivity*</td>
<td width="50">uS/cm</td>
<td width="40">350</td>
<td width="70">250-750</td>
</tr>
</table>

bertoni · Jan 23, 2006

I would use an RO-DI unit with that water. The phosphate level seems a bit high for many setups. This article discusses acceptable ranges of a lot of water parameters:

http://www.reefkeeping.com/issues/2004-05/rhf/index.php

Silica is rather high as well.

Randy Holmes-Farley · Jan 24, 2006

Assuming that is ppm phosphate, I agree. Copper from your own pipes is another big concern. Chloramine and the silica are other issues as well.

jahull · Jan 24, 2006

Okay. Thanks guys. I just wanted to make sure before I made the big investment in an RODI. Thanks for the input!

(sorry for the huge space in my last post. I'm not sure how it got there)

Randy Holmes-Farley · Jan 25, 2006

No problem.

You're welcome and good luck.

my tapwater composition. how does it look?

jahull

New member

bertoni

Randy Holmes-Farley

Reef Chemist

jahull

New member

Randy Holmes-Farley

Reef Chemist

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