seachem posguard
 

Has any one used seachem phosguard in a reactor

Yes, works fine, just rinse it well and don't tumble it.

Ok will give it a try!

Here's an interesting article about aluminum and Phosguard.

http://www.advancedaquarist.com/2003/7/chemistry

From the conclusion of the article.
" Phosguard has been shown to release aluminum to artificial seawater. Further, it appears that the release of aluminum could be the cause of the effects that some folks have seen in aquaria when using aluminum-based phosphate and silicate absorbing materials. "

--- Warning... Anecdotal Info following ---
For what it's worth I used to use Arm and Hammer Baking Soda. I noticed after a while that the Finger Leather Corals(Sinularia sp.) in my tank weren't doing that well. Arm and Hammer Baking Soda is known to have aluminum in it.

Seachem has done extensive research, aluminum oxide will only leach if the ph is in the 5's in which case your reef has bigger problems. They detail it on their website.

Please read the article. That is not what highly accurate water testing showed.

I respect Randy and what he has done for the hobby but that article is nearly 15 years old.

I think MarinePure releasing aluminum is likely a bigger problem now and is much more widely reported.

Here is Seachem's report on the matter;

http://www.seachem.com/downloads/art...y-Toxicity.pdf


I do realize they are not an independent third party.