Reef Central Online Community

Home Forum Here you can view your subscribed threads, work with private messages and edit your profile and preferences View New Posts View Today's Posts

Find other members Frequently Asked Questions Search Reefkeeping ...an online magazine for marine aquarists Support our sponsors and mention Reef Central

Go Back   Reef Central Online Community > General Interest Forums > The Reef Chemistry Forum
Register Blogs FAQ Calendar Mark Forums Read

Notices

Reply
Thread Tools
Old 04/26/2012, 07:14 AM   #1
reefnewbie83177
Registered Member
 
Join Date: Nov 2011
Posts: 193
Really high Magnesium

Hi all,
So I have been having really high magnesium in my reef tank. Here are my Params:
NH3: 0
NO2: 0
NO3: 0
Phosphate: undetectable
SG: 1.025-1.026
Temp: 78.6 - 78.8
Alk: 8.7 - 9.5
Ca: 450 - 490
Mg: 1700

I feed once a day with frozen mysis/krill/etc and one strip of Garlic Soaked Nori. I use Instant Ocean Sea Salt. I used Purple a while back, and I know that does contain Mg.

I have a low bioload. In my 90 gallon + 30gallon sump I have the following stock:

Yellow tang
Sailfin tang
Coral beauty Angel
Dragonet
Two Clowns

3 Acros (small frags)
2 montis (small frags)
Frogspawn
Hammerhead
green star polyp
button coral

RBTA Anemone
A lot of other inverts (hermits,snails, shrimp)

Everything looks just fine and I am not too worried about it, but just odd. I dose 20mL of BRS 2-part solutions. I am using a red sea pro test kit. I just don't know where all this Mg is coming from. I plan on getting a salafert test kit, and I will be testing my Instant Ocean salt as soon as it is ready.

Any other ideas? Should I be worried? I am getting great growth on my SPS and the coraline algae is growing nicely.

Thanks


reefnewbie83177 is offline   Reply With Quote
Old 04/26/2012, 08:34 AM   #2
pakirri
Registered Member
 
Join Date: Apr 2010
Location: Maryland
Posts: 162
whats your ph? I have experienced high magnesium on high ph.. I am not sure if its related my guess that it is not but who knows? maybe Randy


pakirri is offline   Reply With Quote
Old 04/26/2012, 08:45 AM   #3
reefnewbie83177
Registered Member
 
Join Date: Nov 2011
Posts: 193
Quote:
Originally Posted by pakirri View Post
whats your ph? I have experienced high magnesium on high ph.. I am not sure if its related my guess that it is not but who knows? maybe Randy
sorry, i knew i would miss something. my pH is always b/w 8.0 and 8.3 depending on the time of day


reefnewbie83177 is offline   Reply With Quote
Old 04/26/2012, 10:11 AM   #4
reefnewbie83177
Registered Member
 
Join Date: Nov 2011
Posts: 193
Anyone else have any ideas? Randy? Thanks


reefnewbie83177 is offline   Reply With Quote
Old 04/26/2012, 10:22 AM   #5
Mikez1207
MrReef 101
 
Mikez1207's Avatar
 
Join Date: Jan 2012
Location: Pasadena, TX
Posts: 377
Are you dosing mag?


__________________
5G pico mix

Current Tank Info: Growing
Mikez1207 is offline   Reply With Quote
Old 04/26/2012, 10:26 AM   #6
reefnewbie83177
Registered Member
 
Join Date: Nov 2011
Posts: 193
Quote:
Originally Posted by Mikez1207 View Post
Are you dosing mag?
Nope. This tank is going on 5 months. The first two months I used purple up, and I know that that does have some mag in it, but I always used according to manufacturers directions so that shouldn't have done it. I also use the BRS 2 part, but have not used any of the Mg that comes with it.


reefnewbie83177 is offline   Reply With Quote
Old 04/26/2012, 10:57 AM   #7
shiladitya1991
Registered Member
 
Join Date: Sep 2009
Location: India
Posts: 355
Quote:
Originally Posted by reefnewbie83177 View Post
Nope. This tank is going on 5 months. The first two months I used purple up, and I know that that does have some mag in it, but I always used according to manufacturers directions so that shouldn't have done it. I also use the BRS 2 part, but have not used any of the Mg that comes with it.
Purple up got you into trouble..mag levels can never be more than the salt mix levels,unless u use any additives... Try Kalk.. Make sure your test kit is perfect


shiladitya1991 is offline   Reply With Quote
Old 04/26/2012, 09:47 PM   #8
bertoni
RC Mod
 
Join Date: Mar 2002
Location: Mountain View, CA, USA
Posts: 74,320
The only reasonably fast way to lower the level is through water changes. I agree with checking the level in some freshly-mixed saltwater.


__________________
Jonathan Bertoni
bertoni is online now   Reply With Quote
Old 04/26/2012, 10:40 PM   #9
bugs713
In-A-Gadda-Divita!
 
bugs713's Avatar
 
Join Date: Sep 2011
Location: Apache Junction, AZ - USA
Posts: 2,371
I had the same mag levels when using Purpleup; went back to normal after 3 weeks of not using it and weekly WC.


__________________
O|||||||O
bugs713 is offline   Reply With Quote
Old 04/27/2012, 06:32 AM   #10
reefnewbie83177
Registered Member
 
Join Date: Nov 2011
Posts: 193
Quote:
Originally Posted by bugs713 View Post
I had the same mag levels when using Purpleup; went back to normal after 3 weeks of not using it and weekly WC.
That's the thing, It has been at least 2 months since I used it. Still waiting on a salafert test kit for Mg.


reefnewbie83177 is offline   Reply With Quote
Old 04/27/2012, 06:41 AM   #11
Randy Holmes-Farley
Reef Chemist
 
Randy Holmes-Farley's Avatar
 
Join Date: Apr 2001
Location: Arlington, Massachusetts
Posts: 85,830
i do not think magnesium is that high due to Purple Up unless you added massive amounts. In 100 gallons of water, you need to add 3 liters of a pure magnesium supplement (like B-ionic Magnesium) to boost magnesium by 300 ppm.


__________________
Randy Holmes-Farley

Current Tank Info: 120 mixed reef
Randy Holmes-Farley is online now   Reply With Quote
Old 04/27/2012, 08:06 AM   #12
reefnewbie83177
Registered Member
 
Join Date: Nov 2011
Posts: 193
Quote:
Originally Posted by Randy Holmes-Farley View Post
i do not think magnesium is that high due to Purple Up unless you added massive amounts. In 100 gallons of water, you need to add 3 liters of a pure magnesium supplement (like B-ionic Magnesium) to boost magnesium by 300 ppm.
That's exactly what I thought Randy. I will be testing a pre-mixed batch of saltwater later this afternoon. If it shows really high Mg then I will assume that it is either a bad batch of Instant Ocean or my test kit is severely off. I just don't know what else it could be. It's not like Mg can just spontaneously enter my water.


reefnewbie83177 is offline   Reply With Quote
Reply

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 On

Forum Jump


All times are GMT -6. The time now is 04:02 PM.


TapaTalk Enabled

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Use of this web site is subject to the terms and conditions described in the user agreement.
Reef CentralTM Reef Central, LLC. Copyright 1999-2014