Convert mg/l to meq/l or dKH?

[rostato]

I am almost out of my Salifert KH test kit, so I got a Hach alkalinity kit, and cannot seem to figure out where mg/l compares to meq/l or dKH.

Any inputs?

Still googling, if I figure it out I'll post.

 

[derek_s]

All i know is that 2.8*meq/L equals dKH. But that is not what you are looking for...

So post if you find it.

 

[rostato]

Yeah I found that, and all sorts of other conversions, like how to find alkalinity by using calcium and magnesium levels, but nothing I need.

I am beginning to think its not a possible conversion, but I am no chemist, just some dummy trying to read dKH values in his tank before his calcium reactor kills everything...

 

[rostato]

found this written by David E. Ramos...only problem is there is no calcium carbonate (CaCO3) conversion...
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<legend> Attached files </legend>

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class="gc-images" title="z conversion.jpg[/IMG] style="max-width:300px" /></a> </fieldset>

 

[derek_s]

Does the hatch kit not have instructions that tell you what the appropriate range in mg/L is? If you knew that you might be able to ballpark it, realtively.

Maybe call Hach customer service and see if they know.

 

[rostato]

How it just tells you how to get readings. I may call them good Idea...

 

[weaglereefer]

First Google hit:

This is the correct conversion from milliequivalents/liter (meq/l) to degrees. To convert from mg/l of alkalinity to meq/l you have to divide the alkalinity by 50 to get meq/liter, then you multiply by 2.8 to get degrees. Or just divide by 17.9 - its the same thing.

 

[rostato]

ok, what did you search? I am gonna go test it and see if I get a close reading to my Salifert

 

[weaglereefer]

mg/l to dkh

 

[rostato]

Ok here are the results.

It took 8 drops of tritant to change colors. I had to multiply that number by 20

8x20=160 mg/l

16050= 3.2 meq/l = 9dKH

My salifert reads 8 dKH, so I think its darn close enough to be correct THANKS!

Looks like I am staying in range to start VSV again...very nice

 

[weaglereefer]

What is the range needed for VSV? I've been looking into it but decided that my current skimmer is not sufficient.

 

[rostato]

by the way I was being all technical searching milliequivalent per liter to milligrams per liter. Guess thats what I get for trying to be specific...

You want to keep your dKH between 8-9 preferably arouns 8.5. This is only so you don't burn the tips of your SPS.

Personally, I ran an 11dKH last time and did not see any ill effects, but I only rant it for like a month and a half before I upgraded. I couldnt get it any lower than that because I was using reef crystals, now I use seachem!

 

[weaglereefer]

I'm just lazy.

 

[rostato]

I am lazy too, guess I should just be myself!

 

[mfliin]

You want to keep your dKH between 8-9 preferably arouns 8.5. This is only so you don't burn the tips of your SPS.QUOTE]

Please explain....tips starting to turn white? Checking my dkh now!

Just checked...it's at 10. My G/F noticed my starrynight acro has white tips growing, I thought it was just the lighting, nothing else has changed....hmmm

 

[rostato]

That is only if your dosing Vokda Vinegar and or Sugar. White tips are usually new growth...

 

[mfliin]

That's what I thought....emergency over! Thanks!

 

[rostato]

Np

 

[nickskains]

http://ozreef.org/library/tables/alkalinity_conversion.html">http://ozreef.org/library/tables/alkalinity_conversion.html</a>

Great link. I keep it bookmarked for when I dose KH since the Seachem stuff is the same way and I use Elos kits which are dKH.

 

[rostato]

Great link. I bookmarked it too.