Iron Oxide Hydroxide (GFO) Phosphate Binder

Boomer

Reef Sanctuary's Mr. Wizard
My article “Iron Oxide Hydroxide (GFO) Phosphate Binders” has posted at
http://reefkeeping.com/issues/2004-11/rhf/index.htm

from it:

“This article will describe what they are, how they bind phosphate, what else they may bind, and what other effects they have. I'll also discuss some potential explanations of certain negative effects that a number of aquarists have encountered when using these materials, including the potential bleaching of corals and the precipitation of calcium carbonate.”
 

Curtswearing

Active Member
Great job Boomer and Randy!!!

Aquarists who choose to use such materials should be aware of the possible biological problems that other aquarists have encountered. Starting slowly and allowing the phosphate to decline over a period of a week or two may be less stressful than dropping it in a period of hours, regardless of the mechanism of the problems encountered. Using a smaller amount of material, and changing it more frequently, may also be less stressful. Salifert recommends using 250 mL (8.5 ounces) of its product (Phosphate Killer) to treat a 125-250 gallon tank for up to three months. There is, however, nothing wrong with starting with 1/10 that amount to see what happens. While it may be more work, using one ounce and changing it after two weeks may reduce some of the issues that aquarists have observed when changing the media.

This DEFINATELY seems the wisest course to me and I have read from others that they believed it helped their systems.

Aquarists should also be aware that dropping phosphate to extremely low (i.e., growth limiting) levels may cause undesirable effects that reef aquarists do not typically encounter without using such materials.

Boomer, this seems near impossible to me to get a closed system that low unless the aquarist had a MASSIVE skimmer, AND a refugium, AND replaced their DI resins every month, AND used a phosphate-free salt mix, AND they turkey basted their rocks each and every day, AND barely fed any food at all, AND the food they had was simply blender mush that was stripped of all polyphosphates, then blended, soaked in RO/DI water again, and then strained through some sort of mesh.

Boomer, I'm trying to picture in my mind just how few tanks in the world have so few phosphates that they are limiting based on my example above. It seems to me that any problems are based on the statement, "no good thing ever happens quickly in a reef tank" as opposed to a P limitation. I'm curious on your thoughts.
 

mps9506

Well-Known Member
Mebe it's time for me to rethink using this stuff again?

BTW, boomer, do you have any good articles regarding metal eating bacteria?
 

Boomer

Reef Sanctuary's Mr. Wizard
I completely spaced this out . Sorry, Curt and Mike :)

Curt

Boomer, this seems near impossible to me to get a closed system that low

I would agree but some guys are nuts :lol:

Boomer, I'm trying to picture in my mind just how few tanks in the world have so few phosphates that they are limiting

Like you can image few. P limiting under the right conditions is possible but first the P has to reach well below .06 mg / l Total P . Don't forget you are measuring only PO4 ( Orthophosphates; H3PO4, H2PO4, HPO4, PO4 all of these are most of which are pH dependent and HPO4 complexes),Species not included are Organic Phosphate, Pyrophosphate, Tripolyphosphate and Metaphosphate. Although the last 3 are hydrolyzed easily into Orthophosphate

phosphate can be a difficult nutrient to limit in a closed reef system.

You may want to read this;

http://www.aquariumfish.com/aquariumfish/detail.aspx?aid=2276

Mike

BTW, boomer, do you have any good articles regarding metal eating bacteria?

Sorry I don't but you may want to do this for you interests in bacteria. Go or call the local public library. Tell them you want the books below. They of course will not have these but will send out a request loan to the state UN. You will receive them for 2 wks at no charge. You can do the same for almost any scientific article you want. They won't have it either but the state Un will make a photo copy and send it to the local/public and you get it for free. I have done this many times and have a stack of scientific papers.

Microbial Ecology of the Oceans by David L. Kirchman

Bacterial Biogeocehmistry; The Ecophysiology of the Mineral Cycling by T. Fenschel.G.M. Kink nd T.H. Blackburn.

I have both of these books :D

Here is a start for you

http://www.genomenewsnetwork.org/articles/04_02/metal_eating_lit.shtml

http://www.biomedcentral.com/news/20040226/01/

http://news.nationalgeographic.com/news/2004/04/0412_040412_pulsegeobacter.html

http://www.findarticles.com/p/articles/mi_m1200/is_20_164/ai_110963009

http://hsc.csu.edu.au/chemistry/options/shipwrecks/2733/ch966Dec2_03.htm
 

Curtswearing

Active Member
Wow!!! It's look like I have some heavy reading to do.

Thanks Boomer.

BTW---it's pretty cool that Geobacter can clean up Uranium out of groundwater.
 
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