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 07-29-2004, 08:21 PM   #1
Aquarium Advice Apprentice
 
Join Date: Feb 2004
Location: Portugal
Posts: 19
HELP - Calcium and Hardeness won't stay high

Hi,

I have a reef for about 7 months and the thing that gives me more headaches is mantaining calcium and hardeness in high values.

I use an osmolator for top-off water with Kalkwasser that adds more or less 2 litres of water into the aquarium.
With this method I only get 380 mg/l of calcium and about 125 mg/l or 7 dkh of carbonate hardness.
Too low won't you agree ???

I then started adding addictives like dkh pro buffer or part A+ part B both from kent marine till I reached 11 dkh or 200 mg/l hardness.Then used kalkwasser to mantain and a couple days later both values started falling again.

Why ??? am I suposed to substitute kalkwasser with addictives ??

Please help me find a solution

Thanks
__________________

__________________
YellowTang is offline   Reply With Quote
Old 07-29-2004, 09:54 PM   #2
Aquarium Advice FINatic
 
Join Date: Oct 2002
Location: Lancaster, PA
Posts: 869
Send a message via ICQ to jackdp
What is in the tank that is using up your calcium and carbonate? Do you do regular water changes with freshly mixed SW...how often? 380 mg/l Ca and 7 dkh are just on the low side. Post some more detail about your system to get some better help. In the meantime, check out this article about solving calcium and alkalinity problems.

http://www.advancedaquarist.com/issues/nov2002/chem.htm

And here's one that can help choose a supplementation scheme...

http://www.advancedaquarist.com/issues/feb2003/chem.htm

There's a lot of science in there but very good info if you can digest. If you have any questions ask away! HTH
__________________

__________________
Brad C.
jackdp is offline   Reply With Quote
Old 07-31-2004, 08:22 AM   #3
Aquarium Advice Apprentice
 
Join Date: Feb 2004
Location: Portugal
Posts: 19
Well, my aquarium is about 55 gallons with 50 kg live rock.

I do weekly water changes of about 7 galons.

I read somewhere something about magnesium interacting with calcium and hardness. What is te relation ?

thanks
__________________
YellowTang is offline   Reply With Quote
Old 07-31-2004, 09:35 AM   #4
Aquarium Advice FINatic
 
Join Date: Jul 2003
Location: Defuniak Springs, Fl
Posts: 636
I know if you start using Oceanic salt your calcium will go up. Some claim that they have just stop using all additives because of this salt. Me included.
__________________
150 gal inwall reef tank, DIY everything except the tank and skimmer, MAG-24 return, 3 1200 Maxi-jets, Turboflotor 1000 Skimmer, 100qt Igloo Cooler sump.

www.panhandlereefers.com

Join N. Florida Regional Forum
GrndHog is offline   Reply With Quote
Old 07-31-2004, 02:36 PM   #5
steve-s
Guest
 
Posts: n/a
Quote:
Originally Posted by YellowTang
I read somewhere something about magnesium interacting with calcium and hardness. What is te relation ?
Mg helps keep alk an Ca in solution together. They are chemically at odds and one is always trying to push the other out of solution. The Mg is what prevents that.

As long as the Mg is in the 1200-1400 ppm range (3x the Ca) depending on where Ca is normally maintained, it should not be an issue. Given the fact that your alk reading is not bad, it appears your simpley having a small problem maintaining the Ca. If Mg where deficient, your problem would be the other way 'round. Alk would be low and Ca higher.

As jackdp indicated above, your levels are on the lower side of the scale but not really something to be overly concerned about. The only thing you need do is elevate the Ca a tad (400-410 ppm) to get a bit more in balance over the alk.
__________________
  Reply With Quote
Old 08-07-2004, 05:09 PM   #6
Aquarium Advice Apprentice
 
Join Date: Feb 2004
Location: Portugal
Posts: 19
Hi there,

well I analysed my top off water to make sure that every parameter was ok and guess what ??

Ca = 40 mg/l
dKH = 2,2 ¬ļ or 40 mg/l
pH=8,5

Is this correct or my top off water keeps pushing my aquarium water parameters down ??
__________________
YellowTang is offline   Reply With Quote
Old 08-07-2004, 05:50 PM   #7
steve-s
Guest
 
Posts: n/a
Top off water will have little if any effect on your overall water specs. Given most use (or should be) RO water which is basically void, it's not an issue. What you should be looking at is the specs of newly mixed SW after aerateing with a powerhead and heater for 12-24 hrs. That will tell you wether of not simple weekly water changes are needed based on the CaCO3 demand in your tank. If not, then deciding on a supplimental scheme would be the next step.

Cheers
Steve
__________________
  Reply With Quote
Old 08-08-2004, 09:30 AM   #8
Aquarium Advice Apprentice
 
Join Date: Feb 2004
Location: Portugal
Posts: 19
ok, the parameters from my sw weekly change are :

Ca = 380 mg/l
dKH = 7,8
pH = 7,9

Should I correct this parameters before using it ??
__________________
YellowTang is offline   Reply With Quote
Old 08-09-2004, 06:33 PM   #9
steve-s
Guest
 
Posts: n/a
Was that from the tank or newly prepared SW?

The Ca is a bit low based on the alk but not a huge issue. You might want to add a bit of CaCl to bring it up a bit. It would be a better balance in the 405-415 (ish) ppm range. Just be sure the salt has been mixed for at least 12 hrs before hand.

If you tested the pH in the AM it's okay but if later in the day, it's low. At about midday or later, pH should be 8.0-8.3 depending.

Cheers
Steve
__________________
  Reply With Quote
Old 08-10-2004, 05:04 PM   #10
Aquarium Advice Apprentice
 
Join Date: Feb 2004
Location: Portugal
Posts: 19
These parameters are from newly prepared SW.

Strange, I thought that Alk was low and calcium was low but not to worry about.
__________________

__________________
YellowTang is offline   Reply With Quote
Reply

Tags
calcium

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 too high? melissasreef Saltwater & Reef - Getting Started 12 07-06-2009 01:21 PM
Calcium too high robertfah Saltwater Fish Only & FOWLR 20 06-22-2008 06:07 PM
Alkalinity and Calcium HIGH Calcium reactor not hooked up ye doughboydj Saltwater Reef Aquaria 4 05-29-2005 01:35 PM
really high calcium Peeley Saltwater Reef Aquaria 2 02-07-2004 11:07 PM
My calcium is high toddwess Saltwater Reef Aquaria 5 09-02-2003 04:11 PM







» Photo Contest Winners








Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -4. The time now is 12:16 AM.


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