ad-button
Reply
 
LinkBack Thread Tools
Old 09-29-2008, 06:08 PM
  #1
Giant Squid
 
Peredhil's Avatar
 
Join Date: Aug 2008
Location: Texas
Age: 35
Posts: 5,182
Skin: Classic
Karma: 6610130
Peredhil has a reputation beyond reputePeredhil has a reputation beyond reputePeredhil has a reputation beyond reputePeredhil has a reputation beyond reputePeredhil has a reputation beyond reputePeredhil has a reputation beyond reputePeredhil has a reputation beyond reputePeredhil has a reputation beyond reputePeredhil has a reputation beyond reputePeredhil has a reputation beyond reputePeredhil has a reputation beyond repute


3reefer 
3link 
gallery
Question Alk and kh test help

I've been using an Alkalinity test from Aquarium International. It's the first drop -> blue, count drops until it's yellow. Including that first drop, it takes 7. It tells me to divide by 2 - so the unit is 3.5. This number doesn't make sense to me.

I got in my API Reef test kit and this has a Carbonate Hardness (kh) test. It's basically the same thing. Only with this test, it takes 10 drops to go from blue -> yellow. According to its chart, this means I have 179 as my score.

I did both tests, back to back, twice. Same results as stated above.

So I've got a couple questions - so far, this is the test I understand the least.

1. I've read that alk and kh are interchangeable. Is this true? If it is, I will stop with the alk test and rely on the API kh test.

2. The API kh test says that ideally it should take anywhere from 8-12 drops. Do you agree 3reefers? Giving me a score of 179.

As a matter of FYI, I will list all scores from my last testing round (yesterday). But I'm only asking for info on the above. (BTW - tank is a few years old, but moved to my house 8/15 (same water, etc.))

Temp 79 <consistent>
SG 1.027 <consistent>
Ca 400 <mostly consistent>
PH 8.4 <I'm getting better at deciphering the colors on this one>

Ammonia, Nitrite both 0 <consistent since 9/12>
Nitrate 15 <was at 20 since 8/23, seems I'm ending a cycle>
Phosphate .5 <first time to run> that's point five.

And of course

Alk 7 drops or 3.5 after conversion - if I'm converting correctly? But it's been 7 drops since 8/25 when I first got this test.

kh 10 drops/179. First time to run it.
Peredhil is offline   Reply With Quote Top
 
Click Here!
Old 09-29-2008, 07:17 PM   #2
Giant Squid
 
PharmrJohn's Avatar
 
Join Date: Jun 2008
Location: Shelton, Washington
Age: 50
Posts: 4,613
Skin: Mint
Karma: 27435
PharmrJohn has a reputation beyond reputePharmrJohn has a reputation beyond reputePharmrJohn has a reputation beyond reputePharmrJohn has a reputation beyond reputePharmrJohn has a reputation beyond reputePharmrJohn has a reputation beyond reputePharmrJohn has a reputation beyond reputePharmrJohn has a reputation beyond reputePharmrJohn has a reputation beyond reputePharmrJohn has a reputation beyond reputePharmrJohn has a reputation beyond repute


3reefer 
contributor 
protector 
3link 
gallery
Default

If it is like mine, then you multiply the 3.5 by 2.8 to get the dKH to get 9.8. The 179 sounds like ppm. In order to convert that to dKH, you divide by 50 then multiply by 2.8.

179/50=3.58
3.58x2.8=10.02 dKH

Just off the top of my head. But it looks right given the numbers you supplied using both tests. And yes, they are interchangable. You can do a series of multiplications and/or divisions to convert from one to the other. They indicate the same thing in the end, just from different angles.
PharmrJohn is offline   Reply With Quote Top
Old 10-03-2008, 04:45 AM   #3
ALW
Sea Dragon
 
ALW's Avatar
 
Join Date: Apr 2008
Location: South Florida
Posts: 503
Skin: Mint
Karma: 1682
ALW has a brilliant futureALW has a brilliant futureALW has a brilliant futureALW has a brilliant futureALW has a brilliant futureALW has a brilliant futureALW has a brilliant futureALW has a brilliant futureALW has a brilliant futureALW has a brilliant futureALW has a brilliant future


3reefer 
protector 
 
gallery
Default

Nice work PharmR.
ALW is offline   Reply With Quote Top
Old 10-03-2008, 05:43 AM   #4
Zoanthid
 
ermano's Avatar
 
Join Date: Feb 2008
Location: Rochester, New York
Posts: 1,112
Skin: Mint
Karma: 48617
ermano has a reputation beyond reputeermano has a reputation beyond reputeermano has a reputation beyond reputeermano has a reputation beyond reputeermano has a reputation beyond reputeermano has a reputation beyond reputeermano has a reputation beyond reputeermano has a reputation beyond reputeermano has a reputation beyond reputeermano has a reputation beyond reputeermano has a reputation beyond repute


 
gallery
Default

i use the API kH test too and it states that however many drops it takes then thats what your dKH is. So say it takes 11 drops to turn it from blue to yellow, then you have 11dKH. Like PharmrJohn said, the conversions go like this...


1 meq/l = 2.8 dKH = 50 ppm CaCO3(Calcium Carbonate)
ermano is offline   Reply With Quote Top
Old 10-03-2008, 07:27 AM   #5
Giant Squid
 
Peredhil's Avatar
 
Join Date: Aug 2008
Location: Texas
Age: 35
Posts: 5,182
Skin: Classic
Karma: 6610130
Peredhil has a reputation beyond reputePeredhil has a reputation beyond reputePeredhil has a reputation beyond reputePeredhil has a reputation beyond reputePeredhil has a reputation beyond reputePeredhil has a reputation beyond reputePeredhil has a reputation beyond reputePeredhil has a reputation beyond reputePeredhil has a reputation beyond reputePeredhil has a reputation beyond reputePeredhil has a reputation beyond repute


3reefer 
3link 
gallery
Default

Thanks! Just the explanation I was looking for pharmr
Peredhil is offline   Reply With Quote Top
Old 10-04-2008, 06:04 PM   #6
Giant Squid
 
PharmrJohn's Avatar
 
Join Date: Jun 2008
Location: Shelton, Washington
Age: 50
Posts: 4,613
Skin: Mint
Karma: 27435
PharmrJohn has a reputation beyond reputePharmrJohn has a reputation beyond reputePharmrJohn has a reputation beyond reputePharmrJohn has a reputation beyond reputePharmrJohn has a reputation beyond reputePharmrJohn has a reputation beyond reputePharmrJohn has a reputation beyond reputePharmrJohn has a reputation beyond reputePharmrJohn has a reputation beyond reputePharmrJohn has a reputation beyond reputePharmrJohn has a reputation beyond repute


3reefer 
contributor 
protector 
3link 
gallery
Default

Quote:
Originally Posted by Peredhil View Post
Thanks! Just the explanation I was looking for pharmr
No problem man.
PharmrJohn is offline   Reply With Quote Top
 

Click Here!

Reply

Tags
alkalinity, carbonate hardness, test

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Join 3reef Aquarium Forums