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Old 06/09/2021, 04:36 PM   #1
LouCiro
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Join Date: Sep 2013
Location: MN
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Smile Po4 level

What PO4 level do we need to be below eliminate Cyanobacteria in a reef tank?
Thanks
Lou


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Old 06/10/2021, 06:46 AM   #2
Timfish
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Location: Austin, TX
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Sorry, but there's no such number. Keeping it too low (below .03 mg/l) will have a negative impact on coral's photobiology potentially causing bleaching and death. Upwelling will expose corals to levels as high as .2 mg/l so somewhere between those numbers is probably what's best. (Research shows higher levels increase growth rates but also can make skeletons more brittle.) Here's some links if you want to look into the roles of organic and inorganic (PO4) phosphorus in reef systems:

Richard Ross What's up with phosphate"
https://youtu.be/ZRIKW-9d2xI

Forest Rohwer "Coral Reefs in the Microbial Seas"
https://www.youtube.com/watch?v=-R2BMEfQGjU

Changing Seas - Mysterious Microbes
https://www.youtube.com/watch?v=c7hsp0dENEA

Nitrogen cycling in hte coral holobiont
https://youtu.be/DWItFGRQJL4

BActeria and Sponges
https://www.youtube.com/watch?v=-oLDclO7UcM

https://www.cambridge.org/core/journ...D254623FD3C7C#
An Experimental Mesocosm for Longterm Studies of Reef Corals

Phosphate Deficiency:
Nutrient enrichment can increase the susceptibility of reef corals to bleaching:
https://www.nature.com/articles/nclimate1661

Ultrastructural Biomarkers in Symbiotic Algae Reflect the Availability of Dissolved Inorganic Nutrients and Particulate Food to the Reef Coral Holobiont:
https://www.frontiersin.org/articles...015.00103/full

Phosphate deficiency promotes coral bleaching and is reflected by the ultrastructure of symbiotic dinoflagellates
https://www.sciencedirect.com/scienc...601?via%3Dihub

Effects of phosphate on growth and skeletal density in the scleractinian coral Acropora muricata: A controlled experimental approach
https://www.sciencedirect.com/scienc...22098111004588

High phosphate uptake requirements of the scleractinian coral Stylophora pistillata
http://jeb.biologists.org/content/214/16/2749.full

Phosphorus metabolism of reef organisms with algal symbionts
https://esajournals.onlinelibrary.wi...Vm0sG8_0vth6lq

https://therichross.com/skeptical-re...and-phosphate/

Sponge symbionts and the marine P cycle
https://www.pnas.org/content/112/14/4191

Phosphorus sequestration in the form of polyphosphate by microbial symbionts in marine sponges
https://www.pnas.org/content/112/14/4381


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