manganese

Micki · #1 10/14/2004, 05:49 AM

Is manganese the same thing as magniesium?

Habib · #2 10/14/2004, 05:56 AM

Manganese and magnesium are totally different.

Mn = Manganese
Natural seawater conc less than 1 ppb , very important trace element

Mg = Magnesium
Natural seawater conc approx 1300 ppm = 1,300,000 ppb

Micki · #3 10/14/2004, 06:01 AM

So would it be beneficial to add either of these to our tanks?

Habib · #4 10/14/2004, 06:02 AM

FWIW Manganese is easily preciptated in seawater and most of the magnese will be bound to organics.

I don't know if the question is because of the article by Tim Hovanac but in one of the salts the Mn conc was so high (if the measurement was correct) that it would form a precipitate unless a complex forming agent was present in the salt.

Habib · #5 10/14/2004, 06:05 AM

Quote:

Originally posted by Micki
So would it be beneficial to add either of these to our tanks?

Magnesium only if it is balanced with the calcium based on incorporation in corals, as in some supplements or only if a measurement shows it to be too low.

Many trace element supplements will/should contain manganese but also the food we add.

I think it is beneficial to add but I'm also a manufacturer of trace element supplements.

Micki · #6 10/14/2004, 06:07 AM

Actually the question is because of the article on gonioporas and the addition of iron and manganese. Some people think this helps them. http://advancedaquarist.com/issues/dec2002/invert.htm

taken from a post in the general discussion forum.
Thanks!

Habib · #7 10/14/2004, 06:09 AM

We had discussions about this article here on RC some time ago and also some qustions were asked and comments made at reefs.org by a.o. me and Eric Borneman.

Habib · #8 10/14/2004, 06:11 AM

Here is one thread which also has links to the thread on reefs.org:

http://archive.reefcentral.com/forum...+AND+Goniopora

Micki · #9 10/14/2004, 06:11 AM

Thanks, I'll do a search.

Habib · #10 10/14/2004, 06:14 AM

Quote:

Originally posted by Micki
Thanks, I'll do a search.

I think we posted at the same time, see one post above yours.

You will find more threads by using: manganese AND goniopora

in the search box and looking for thread posted at any time.

HTH

Micki · #11 10/14/2004, 06:17 AM

Thanks so much! I will be reading those later today!

Habib · #12 10/14/2004, 06:32 AM

You're welcome.

Randy Holmes-Farley · #13 10/14/2004, 07:53 AM

Thanks, Habib.

Here are a couple of article on dosing iron, although they do not address goniopora:

First Iron Article: Macroalgae and Dosing Recommendations
http://www.advancedaquarist.com/issues/aug2002/chem.htm

Second Iron Article: Iron: A Look at Organisms Other than Macroalgae
http://www.advancedaquarist.com/issues/oct2002/chem.htm

Here's one that details what magnesium does in aquaria:

Magnesium in Reef Aquaria
http://www.advancedaquarist.com/issues/oct2003/chem.htm

I am not sure whether manganese dosing is necessary or not, or what forms are best to dose if needed. It is something that I'd like to know more about.