Log in

View Full Version : dKH conversions from mg/l



Bug_Power
Wed, 19th Apr 2006, 11:29 PM
I was looking for the conversion information online and found this. I was thinking it would make a good calculator for the site. Basically on the Nutrafin test where it gives you mg/l for KH testing...just take the drops you add in a 5ml sample and divide by 1.79. Or just follow instrucitons on the test kit, multiply by 10, then divide by 17.9

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.

GaryP
Thu, 20th Apr 2006, 07:47 AM
1 meq = 2.8 DKH = 50 ppm

Here's a calculator:

http://www.saltyzoo.com/SaltyCalcs/AlkConv.php

Bug_Power
Thu, 20th Apr 2006, 08:06 AM
The problem though was that my Nutrafin Test doesn't show it as MEQ/L just MG/L so it took 2 conversions from that test kit.

GaryP
Thu, 20th Apr 2006, 08:08 AM
mg/L = ppm

Just shoot for 125-150 mg/L and you will be OK.

Bug_Power
Thu, 20th Apr 2006, 11:30 AM
I'm at 160 now. The reason I started checking is because I mixed up some tank water in my trash can, left it for a week or so, and came back to a white chalky film on everything in the tank. Tasted like chalk. I figured the Calcium had parcipitated out. I didn't dose any calcium, and my tank stayed at 420ish.

TexasTodd
Thu, 20th Apr 2006, 11:36 AM
Target Range I use on my system.
Meq/L DKH PPM
3.8 10.64 190
4.2 11.76 210

Todd

TexasTodd
Thu, 20th Apr 2006, 11:38 AM
Also, IO salt tends to leave that substance on mixing containers......not sure why, but doesn't see to hurt anything.

TT