Chaeto: Can it reduce phosphate? Or only maintain an already low amount?

eddius_maximus

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I routinely pull basketball sizes of chaeto out of my refugium. It's allowed me to remove GFO and use the chaeto as my primary source of nutrient export (paired with an ATB skimmer). This sort of K.I.S.S. system has worked extremely well for me.

Just recently I used (very effectively!) a dose of fluconazole to remove some pesky bryopsis. In the process though, my massive chunk of chaeto stopped growing, and eventually (after some stagnant weeks) started dying.

A couple water changes and a fresh batch of chaeto later, and I got to thinking: I'm assuming my phosphate/nitrate are more elevated than normal right now. As my chaeto gets revved up and going again, will it have the ability to actually reduce? Or should I re-add the GFO to get my phosphate down to a number reachable for chaeto alone to manage?
 
I routinely pull basketball sizes of chaeto out of my refugium. It's allowed me to remove GFO and use the chaeto as my primary source of nutrient export (paired with an ATB skimmer). This sort of K.I.S.S. system has worked extremely well for me.

Just recently I used (very effectively!) a dose of fluconazole to remove some pesky bryopsis. In the process though, my massive chunk of chaeto stopped growing, and eventually (after some stagnant weeks) started dying.

A couple water changes and a fresh batch of chaeto later, and I got to thinking: I'm assuming my phosphate/nitrate are more elevated than normal right now. As my chaeto gets revved up and going again, will it have the ability to actually reduce? Or should I re-add the GFO to get my phosphate down to a number reachable for chaeto alone to manage?

Eddie,
Chaeto will assimilate nutrients in the ratio of N:P at a ratio of 30:1. I see no reason to use GFO. If anything, use GAC.
Nutrient export of dissolved organic carbon, which is natural leakage of corals and algae, has been documented by Ken Felderman peer reviewed articles at Advanced Aquaria.

Protein skimmers remove at best 35% of DOC
GAC removes 70% of DOC
Mature Biofilter removed 50% of DOC
 
That’s reassuring, I appreciate the knowledge.
 

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