Go Back   Aquarium Advice - Aquarium Forum Community > Saltwater and Reef > Saltwater Reef Aquaria
Click Here to Login

Join Aquarium Advice Today
Reply
 
Thread Tools Search this Thread Display Modes
Please support our sponsors and let them know you heard about them on AquariumAdvice.com
 
Old 04-01-2006, 07:19 PM   #1
Aquarium Advice Freak
 
Join Date: Mar 2005
Location: Grand Rapids, MI
Posts: 224
Calcium up, pH down--what to do?

Since setting up my tank, my parameters have been pretty consistent:
Ca 320 ppm
Alk 9 dKh
pH 8.2

Since my alkalinity was good, I tried adding a bit of calcium chloride to bring up my Ca. I added enough today to raise it by what I estimated would be 20 ppm. That worked as expected, but my pH dropped to 7.8! I am guessing that it would be unwise to continue in this fashion, but what should I do then?

Thanks,
Chris
__________________

__________________
cplawrence is offline   Reply With Quote
Old 04-01-2006, 08:47 PM   #2
Aquarium Advice Freak
 
Join Date: Nov 2005
Location: Montgomery County MD
Posts: 288
PWC perhaps? Buffer additives?
__________________

__________________
We live and we learn
AMANIQU77 is offline   Reply With Quote
Old 04-02-2006, 10:10 AM   #3
Aquarium Advice Freak
 
Join Date: Mar 2005
Location: Grand Rapids, MI
Posts: 224
Well, I don't see how a PWC will help seeing as the water I mix will have a calcium level of 320 ppm. As for the buffer, I was under the impression that it would just lead to more problems.
__________________
cplawrence is offline   Reply With Quote
Old 04-02-2006, 11:43 AM   #4
AA Team Emeritus
 
Devilishturtles's Avatar
 
Join Date: Jul 2003
Location: Frederick, Maryland
Posts: 8,544
Send a message via Yahoo to Devilishturtles
What brand of salt mix do you use?

A PWC would help if your freshly mixed water tested higher. Over time, as the calcium gets used up, it drops. A PWC will raise it back up.
__________________
-Lindsay

Live in the Western MD/West Virginia/DC Metro Area?
Join our very active regional forum Here

Like the advice someone just gave you? Add to their reputation! Click on the balance icon underneath their username and let them know.
Devilishturtles is offline   Reply With Quote
Old 04-02-2006, 01:46 PM   #5
Aquarium Advice Freak
 
Join Date: Mar 2005
Location: Grand Rapids, MI
Posts: 224
I understand and I see that I was just not being clear--the water I mix up has always had a Ca reading of about 320 ppm. With the current inhabitants, Ca uptake has been pretty negligible.
The brand is Instant Ocean, btw.
__________________
cplawrence is offline   Reply With Quote
Old 04-02-2006, 02:51 PM   #6
SW REEF 18+ YEARS
Community Admin
 
melosu58's Avatar



Tank of the Month Award
 
Join Date: Oct 2004
Location: Virginia
Posts: 38,249
I agree that the PWC will help stabilize your tank. Your calcium needs to be around 400 to 420.
__________________

SITE ADMINISTRATOR

You can view many of my fish and corals in my photo albums in my profile.

View my tank


AA Community Rules|AA TOS

Forums 101 - posting, accounts, basics
melosu58 is offline   Reply With Quote
Old 04-02-2006, 03:23 PM   #7
Aquarium Advice Freak
 
Join Date: Mar 2005
Location: Grand Rapids, MI
Posts: 224
Quote:
I agree that the PWC will help stabilize your tank. Your calcium needs to be around 400 to 420.
I am sorry but I don't see how a PWC is going to help when the new SW would have a Ca reading of 320 and that issue has not been addressed....
__________________
cplawrence is offline   Reply With Quote
Old 04-02-2006, 03:51 PM   #8
JG
Aquarium Advice FINatic
 
Join Date: Apr 2004
Location: New Hampshire
Posts: 727
Calcium Chloride will break apart in your tank forming calcium ions and chloride ions. The calcium ions have a charge of +2, this means is it short 2 electrons and will react chemically with something that has two extra electrons. Another possibility is that it will combine in a 1:2 ratio with something having a -1 charge.

So your pH drop is most likely the result of the Calcium ions reacting with the carbonate ions in your tank water in the 1:2 ratio. By removing the carbonate ions you will cause a drop in the pH . The addition of a buffer, such as Kent's Superbuffer, into your system would increase the carbonate ions. and bring your pH back up. The buffer also will allow you to increase your Calcium levels

Have fun

JG
__________________
You know you are a true fish-o-holic if you can field strip any powerhead on the market.
JG is offline   Reply With Quote
Old 04-02-2006, 04:07 PM   #9
Aquarium Advice Freak
 
Join Date: Mar 2005
Location: Grand Rapids, MI
Posts: 224
I realize that I do not a great degree of sensitivity in this measurement, but that presumably would have resulted in a decrease in the alkalinity not to mention the fact that what you are describing would lead to the precipitation of calcium carbonate and would not have given a reading in the calcium test.
__________________
cplawrence is offline   Reply With Quote
Old 04-02-2006, 05:12 PM   #10
JG
Aquarium Advice FINatic
 
Join Date: Apr 2004
Location: New Hampshire
Posts: 727
Right... but remember that for every one calcium ion, you are taking out two carbonates. You can deplete your carbonate before you run out of calcium. Also calcium carbonate becomes more soluable as the pH decreases.

May not have been the cause of your pH drop... just a thought...
__________________

__________________
You know you are a true fish-o-holic if you can field strip any powerhead on the market.
JG is offline   Reply With Quote
Reply

Tags
calcium, ph down

Please support our sponsors and let them know you heard about them on AquariumAdvice.com

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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 Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Calcium?? sHistA Saltwater Reef Aquaria 14 08-31-2005 08:09 PM
Alkalinity and Calcium HIGH Calcium reactor not hooked up ye doughboydj Saltwater Reef Aquaria 4 05-29-2005 01:35 PM
Calcium???? Hookman Saltwater Reef Aquaria 4 02-20-2005 01:33 PM
Still have to dose calcium with a calcium reactor? limitup Saltwater Reef Aquaria 1 09-08-2004 09:48 AM
best way to add calcium kalk or calcium reactor? pomme Saltwater & Reef - Getting Started 2 12-02-2003 09:26 AM







» Photo Contest Winners








Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -4. The time now is 07:09 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.