How to lower Phosphate??

Lex_510

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I have a 75gallon tank set up for about 2 years. sump has live rock, and so does the tank. Nyos120 skimmer tht only skims less than 1/2 the cup like every 10 days before I clean cup. growing Cheato. Using filter floss I clean every week or so. Refugium light is on for 8hrs and use Rodi water. Nitrates are at : 12
Phosphate at .90

montipora browsing out, soft coral doing Ok, what’s the best way to lower phosphates? I just put a bag of phosguard in the sump yesterday to see if that helps. Can I put GFO in a filter bag? And for future purposes will a filter roller help?
Thanks

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DanTheReefer

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GFO (granular ferric oxide) media will remove it. Go slowly. I like high capacity GFO better, doesn’t create a mess of dusty fines like regular gfo
 
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Lex_510

Lex_510

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GFO (granular ferric oxide) media will remove it. Go slowly. I like high capacity GFO better, doesn’t create a mess of dusty fines like regular gfo
Can I float GFO in a bag? Or do I need a reactor
 

DanTheReefer

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Can I float GFO in a bag? Or do I need a reactor

If you go floating bag route I’d have it in high flow area. You’ll get faster results and more mileage from a reactor. I have my media reactor and skimmer fed from return pump, no need for extra pumps unless your return is under sized. I like the mini reactors for media

 

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I just put a pinch in a bag in a filter sock and leave it in over night or a few days if my phosphates creep up. Big emphasis on using just a "pinch."
 
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Lex_510

Lex_510

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If you go floating bag route I’d have it in high flow area. You’ll get faster results and more mileage from a reactor. I have my media reactor and skimmer fed from return pump, no need for extra pumps unless your return is under sized. I like the mini reactors for media

Thanks will look into it, so how long does GFO last in the container? Is running GFO a long term thing or add more or less to balance it out, or just add when phos climb
 
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Lex_510

Lex_510

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I just put a pinch in a bag in a filter sock and leave it in over night or a few days if my phosphates creep up. Big emphasis on using just a "pinch."
So how long do you leave GFO in a bag at the sump, is it something you change out once a month or change when phos climb
 

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I'm going to use some acurel phosphate pads til I make a DIY hob refugium. I nuked bryopsis and it brought mine to .25 and caused some nasty cyano to break out as well. Not sure if the phosphate floss stuff is a good idea but here we go!
 

DanTheReefer

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Thanks will look into it, so how long does GFO last in the container? Is running GFO a long term thing or add more or less to balance it out, or just add when phos climb
I had chronically high phosphates for a long time - about 6 months after my tank was set up it read in at 3.0 ppm. When it’s high like that you exhaust the media pretty quickly. It’s just something to check every 4 days or so and once you see it creep up again it’s time to replace the media. Can test less once you get a good pulse on it.

I don’t really have an issue with phosphate anymore, possibly just coral consuming it. I also switched to a higher quality fish food. It hangs out at a steady 0.30 - 0.40. But everything seems to be happy and is growing faster than I’d like to prune it. Adding a picture of my tank to hopefully add a little credibility - kind of in between systems at the moment, in a temp space while our new house is being built



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