GFA vs GFO?

[BriDroid]

I was able to grab some GFA for free. Is it comparable to GFO or is it something completely different? It says for fresh and saltwater on the bottle.

 

[Randy Holmes-Farley Verified Community Expert]

I’m not familiar with folks using it or if aluminum release is a concern.

 

[Dan_P]

I was able to grab some GFA for free. Is it comparable to GFO or is it something completely different? It says for fresh and saltwater on the bottle.

Alumina derivatives may release aluminum into the aquarium. It is probably not the same thing as GFO.

 

[BriDroid]

From what I’ve been able to find, it’s the same thing as Seachem’s PhosGuard.

 

[Randy Holmes-Farley Verified Community Expert]

From what I’ve been able to find, it’s the same thing as Seachem’s PhosGuard.

No, it's not. Phosguard is aluminum oxide (no iron) and it does release aluminum.