richmckee Posted October 28, 2011 Share Posted October 28, 2011 I did a phosguard change about 20 minutes ago running through a standard column filter. I forgot to rinse the pellets of dust....should I be worried or is one time not a big deal? Link to comment Share on other sites More sharing options...
akambience Posted October 28, 2011 Share Posted October 28, 2011 You didn't mention how big a tank or how much phosgard. If there is a lot of dust and larger particulate matter floating about, you may consider running a "polishing filter" packed with filter floss and a layer or two of felt, or double up on your socks for a bit. If it's the white stuff, then it's aluminum oxide and I know nothing about it. If it's not white but a brown or rust color, then it's iron oxide and similar to GFO, and I have done the exact same thing without ill effects. My concern would be the dust getting the the gills of fish, or settling on corals. Link to comment Share on other sites More sharing options...
richmckee Posted October 28, 2011 Author Share Posted October 28, 2011 Thanks for the response. It's a 60 gallon cube (12 gallon sump), 70 gph pump through a column filter with aluminum oxide as the filtration media. I have a polishing filter running as well so that is a relief. I guess I'll just monitor things. Thanks again for the suggestions. Link to comment Share on other sites More sharing options...
Burningbaal Posted October 28, 2011 Share Posted October 28, 2011 You didn't mention how big a tank or how much phosgard. If there is a lot of dust and larger particulate matter floating about, you may consider running a "polishing filter" packed with filter floss and a layer or two of felt, or double up on your socks for a bit. If it's the white stuff, then it's aluminum oxide and I know nothing about it. If it's not white but a brown or rust color, then it's iron oxide and similar to GFO, and I have done the exact same thing without ill effects. My concern would be the dust getting the the gills of fish, or settling on corals. not disagreeing with anything but GFO stands for "Granulated Ferric Oxide" which is a fancy way of saying "iron oxide that's been ground to a certain diameter". my point is that you're statement "iron oxide ...siimlar to GFO" was actually an understatement, chemically it's the same thing. technically, iron oxide is a less precise term (could be ferrous oxide), but ferrous oxide would be useless against phosphate, so I hope that's never confused. not trying to say you're wrong...just trying to strengthen your point. Link to comment Share on other sites More sharing options...
akambience Posted October 29, 2011 Share Posted October 29, 2011 I love it. I went and dug up my old chemistry textbook and found all my undergrad notes too. It was a fun afternoon. Fe2O3. I understand that Iron can be utilized in a few different polymorphs, and I wasn't sure how they were different. But now you made me go look it up and try as I might to remember the chemistry classes I took 7 years ago. I have always used the term ferric in context of the bioavailability of ferric compounds such as in Siderophores. Fun stuff for sure. Link to comment Share on other sites More sharing options...
Burningbaal Posted October 29, 2011 Share Posted October 29, 2011 ferrous compounds are used biologically, so Fe-II and Fe-III both show up in biology a lot. in this case, it's the +2 ion that will bind phosphate because phosphate is PO4 2- (phosphorus&4 oxygens combined to have a negative 2 charge). so the phosphate has a -2 charge, so you need the +2 version of iron...that's ferric I'm a scientist for a living, so this stuff is still stuck in my head Link to comment Share on other sites More sharing options...
Harold B Posted October 29, 2011 Share Posted October 29, 2011 Whats cool is: GFO = Re-usable Link to comment Share on other sites More sharing options...
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