I'm guessing this is bad?

[gnatp2]

one of my mag pumps was acting funny, so I took it apart.

Is this bad? It looks awful, but i'm wondering if it just the same rust that we use as GFO?

Nate

 

[drunktank]

rustbuild up.. i'm guessing u didnt change the screws w/ nylon ones correct?

 

[tosiek]

Its bad, and will affect your coral if it hasn't already.

Its not the same as GFO even though GFO is a form of rust. Nice little info bit from a RC guide:

What is iron oxide hydroxide?
A variety of different materials go by the general description of iron oxide hydroxide. One version is frequently referred to as Granular Ferric Oxide (GFO), and that name will be used throughout this article unless something else specific is intended. Ferric refers to iron in the +3 state, (called iron (III), or Fe[SIZE=-1]+++[/SIZE]), which is the most stable state of iron under aerobic conditions. The iron in GFO is ferric. Ferrous refers to iron in the +2 state (called iron (II) or Fe[SIZE=-1]++[/SIZE]). It is the more stable salt form of iron under anaerobic conditions. There is no ferrous iron in GFO (except perhaps trace impurities).
Iron hydroxide (Fe(OH)[SIZE=-1]3[/SIZE]) is composed of an Fe[SIZE=-1]+++[/SIZE] ion surrounded by three hydroxide (OH[SIZE=-1]-[/SIZE]) ions. It is readily formed by combing any soluble form of Fe[SIZE=-1]+++[/SIZE] with hydroxide ions. Adding Fe[SIZE=-1]+++[/SIZE] (as in iron sulfate or chloride) directly to seawater will instantly form largely insoluble Fe(OH)[SIZE=-1]3[/SIZE], which appears as a brown mud. This effect is the primary reason not to use unchelated ferric salts as iron supplements in marine aquaria, but that's a story for a different article.
At the other end of the extreme of iron (III) oxides and hydroxides is the dehydrated form ferric oxide, Fe[SIZE=-1]2[/SIZE]O[SIZE=-1]3[/SIZE]. It is composed of Fe[SIZE=-1]+++[/SIZE] ions and O[SIZE=-1]--[/SIZE] ions. Solid Fe(OH)[SIZE=-1]3[/SIZE] spontaneously loses water to form a material that is in between these extremes, FeO(OH), which is what is often called iron oxide hydroxide, as shown in equations 1-3.

1. Fe[SIZE=-1]+++[/SIZE] + [FONT=Arial, Helvetica, sans-serif]3[/FONT]OH[SIZE=-1]-[/SIZE] ? Fe(OH)[SIZE=-1]3[/SIZE]
Ferric iron + hydroxide ? iron hydroxide
2. Fe(OH)[SIZE=-1]3[/SIZE] ? FeO(OH) + H[SIZE=-1]2[/SIZE]O
Iron hydroxide ? iron oxide hydroxide plus water
3. [FONT=Arial, Helvetica, sans-serif]2[/FONT]FeO(OH) ? Fe[SIZE=-1]2[/SIZE]O[SIZE=-1]3[/SIZE] + H[SIZE=-1]2[/SIZE]O
Iron oxide hydroxide ? iron oxide plus water
​

Iron oxide hydroxide can be completely amorphous (having randomly arranged ions), completely crystalline (with an ordered arrangement of ions), or something in between. In nature it can take a variety of different crystalline forms, including goethite, lepidocrocite, and limonite. The detailed chemistry of these materials is beyond the scope of this article, but in short, all of the commercial GFO's sold to aquarists are comprised of a solid of Fe[SIZE=-1]+++[/SIZE] and OH[SIZE=-1]-[/SIZE] and O[SIZE=-1]--[/SIZE] ions. How crystalline the different commercial products are is unknown to me, although one manufacturer's representative confided in me the belief that the relative crystallinity is an important difference between some of them. Other differences are also important for phosphate binding, and these will be discussed in the following section.

http://www.reefkeeping.com/issues/2004-11/rhf/index.php

 

[emmanuel]

the screws on my mag pumps are stainless (I think). I've been using them for years and never noticed any rust (but there is a mag 5 running my skimmer way in back of my sump that i haven't looked at in about 2 years . Is it certain ones with the steel screws that need to be changed to nylon ? I think its panic time

 

[reefman]

http://www.manhattanreefs.com/forum/general-discussion/4384-i-m-just-so-mad-sad-warning-all.html

 

[emmanuel]

thanks for the link
like i said ITS PANIC TIME

 

[gnatp2]

Is it only the screws that go bad in these pumps or other parts as well.
Also, are there any problems with other pumps?
I have Tunze's in the tank as well. Can they have the same prob?
Nate

 

[emmanuel]

i just took mine apart only one of the holes had a hint of rust so I cleaned it up and temporarily put it back together the screws are stainless but one did have just a little rust so i put a dab of silicone to seal of the threads , I didn't cover the screw heads because the silicone i had was not the aquarium type but again this was temporary till I get some titanium or plastic screws
temporary usually = forever

 

[gnatp2]

As far as getting the tank water back on track, are water changes and carbon sufficient?
Nate

 

[Tim]

Do both and add a polyfilter also....