<a href=showthread.php?s=&postid=7632102#post7632102 target=_blank>Originally posted</a> by jpatrician
I had been looking into PhosAR and had sent an email to Champion lighting regarding the product after hearing they were supposed to carry it. This is the response I go from them:
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We will not be carrying this product. After testing, we have found it to be
soft and break down in water which can add a lot of iron to the water.
Magnavore has done extensive research on various Granular Ferric Hydroxide
Oxide (GFH) products from Germany. Below you will find an excerpt from their
Phoslock spec sheet. We believe the Phosar to be Bayoxide E33.
Comparison of different phosphate removing products marketed for use in
aquarium applications is challenging for one main reason: all phosphate
removing medias are designed for use in "open-loop" applications such as
cleanup of drinking and waste waters, where contaminated water passes
through the media bed only once. Use of such medias in aquariums is greatly
complicated as aquariums are "closed-loop" systems, where water passes
through the media repeatedly. PhosLock is the first and the only phosphate
removing media that utilizes GFH specifically modified for use in
"closed-loop" applications. Let us review some data on testing media
performance in a real aquarium application.
We will not be comparing white colored phosphate removers such as Phosphate
Sponge and Phos Guard with medias based on GFH, as white colored or aluminum
oxide based medias release phosphate back into aquarium upon reaching their
sorption capacity, thus are not perfectly suitable for use in aquariums.
Comparing to products such as PhosBan and Rowaphos, PU¯RA PhosLock is 10%
more effective than PhosBan and 3.0% more effective than Rowaphos in
removing phosphate from fresh and saltwater. It seems that all three brands
perform very similarly in removing phosphate, but this is not the entire
picture.
Large quantities of free iron in aquariums are known to cause permanent
damage to fish gills. PhosLock is much harder and far less prone to
disintegration in high flows compared to the other brands. Over 72 hrs of
use one gram of PhosLock releases less than 0.02 mg of iron comparing to 3.7
mg per gram of Rowaphos and 98.8 mg per gram of PhosBan. That is 185 times
less than Rowaphos and 4940 times less than PhosBan.
Recently appearing on the pet markets granulated and palletized medias based
on Bayoxide E33 product are about 14% less effective in removing phosphate
and release 270 mg of iron per gram of media â€"œ that is staggering 13500
times more than PhosLock.
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Champion Lighting & Supply
championlighting.com
1-800-673-7822