Basic chem question pH, dKH

marietrg · 05/19/2013, 06:28 PM

My pH is 7.8, my dKH is 8.

Does that make sense? I thought when the dKH is optimal the pH should be optimal too.

What do I need to add to increase my pH if the dKH is the optimal level?

marietrg · 05/19/2013, 06:37 PM

Rest of chem parameters are pH 7.8, dkh 8, ca 290, Mg 1350, Po4 0 salinity .24

cloak · 05/19/2013, 07:20 PM

Check this out.

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

HTH.

MARINECRITTERS · 05/19/2013, 07:33 PM

The DKH is fine, the ph is fine too.

Cloak supplied a great article.

But really no changes are needed, how is your calcium?

disc1 · 05/19/2013, 07:33 PM

Your dkH is optimal and your pH is right in the good zone. What's the problem?

If you want the pH to be higher then focus on the other side of it. pH is set by two things, alkalinity and CO2 concentration. You've got the alkalinity right now look at the CO2.

IMHO I would be cool with the 7.8 and not worry with it. Tends to end up doing more harm than good.

NeilFox · 05/19/2013, 07:48 PM

Some good stuff here. That question isn't as basic as it seems. I still can't get my head around the PH Alk thing.

downbeach · 05/19/2013, 08:50 PM

Good articles here:

http://reefkeeping.com/issues/2007-05/rhf/index.php
http://reefkeeping.com/issues/2006-06/rhf/index.php

cap032 · 05/19/2013, 09:53 PM

If you have a reef tank, Id worry about your Cal at 290.

05/19/2013, 06:28 PM	#1
marietrg Registered Member Join Date: Dec 2002 Location: Chesapeake, VA Posts: 444	Basic chem question pH, dKH My pH is 7.8, my dKH is 8. Does that make sense? I thought when the dKH is optimal the pH should be optimal too. What do I need to add to increase my pH if the dKH is the optimal level?

05/19/2013, 07:33 PM	#4
MARINECRITTERS Registered Member Join Date: Feb 2012 Posts: 1,525	The DKH is fine, the ph is fine too. Cloak supplied a great article. But really no changes are needed, how is your calcium? __________________ MarineCritters, life in the sea is superb Current Tank Info: 91 Gallon Reef

05/19/2013, 07:33 PM	#5
disc1 -RT * ln(k) Join Date: Sep 2010 Location: Little Rock Posts: 9,705	Your dkH is optimal and your pH is right in the good zone. What's the problem? If you want the pH to be higher then focus on the other side of it. pH is set by two things, alkalinity and CO2 concentration. You've got the alkalinity right now look at the CO2. IMHO I would be cool with the 7.8 and not worry with it. Tends to end up doing more harm than good. __________________ David Current Tank: Undergoing reconstruction...

05/19/2013, 09:53 PM	#8
cap032 Registered Member Join Date: Dec 2011 Location: Alabama Posts: 611	If you have a reef tank, Id worry about your Cal at 290. __________________ CTI: 125g, 55g DIY sump, Sicce Syncra 3.0 return, 2x Vortech MP40, 2× Maxspect Razor 16k, RKL + w/ MLC lunar pods, Reef Octo Sro 2000int, Reef Octo AWC, Reef Dynamics BPR 135e

05/19/2013, 06:37 PM	#2
marietrg Registered Member Join Date: Dec 2002 Location: Chesapeake, VA Posts: 444	Rest of chem parameters are pH 7.8, dkh 8, ca 290, Mg 1350, Po4 0 salinity .24

05/19/2013, 07:20 PM	#3
cloak Moved On Join Date: Jul 2000 Location: Stockton, CA Posts: 14,854	Check this out. http://www.reefkeeping.com/issues/2004-05/rhf/index.htm HTH.

05/19/2013, 07:48 PM	#6
NeilFox Registered Member Join Date: Aug 2009 Location: DuPont, WA Posts: 947	Some good stuff here. That question isn't as basic as it seems. I still can't get my head around the PH Alk thing.

05/19/2013, 08:50 PM	#7
downbeach Registered Member Join Date: Nov 2006 Location: Smyrna, Delaware Posts: 3,767	Good articles here: http://reefkeeping.com/issues/2007-05/rhf/index.php http://reefkeeping.com/issues/2006-06/rhf/index.php