Thread: Po4 level
View Single Post
Old 06/10/2021, 07:46 AM   #2
Registered Member
Timfish's Avatar
Join Date: Jul 2010
Location: Austin, TX
Posts: 1,974
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"

Forest Rohwer "Coral Reefs in the Microbial Seas"

Changing Seas - Mysterious Microbes

Nitrogen cycling in hte coral holobiont

BActeria and Sponges
An Experimental Mesocosm for Longterm Studies of Reef Corals

Phosphate Deficiency:
Nutrient enrichment can increase the susceptibility of reef corals to bleaching:

Ultrastructural Biomarkers in Symbiotic Algae Reflect the Availability of Dissolved Inorganic Nutrients and Particulate Food to the Reef Coral Holobiont:

Phosphate deficiency promotes coral bleaching and is reflected by the ultrastructure of symbiotic dinoflagellates

Effects of phosphate on growth and skeletal density in the scleractinian coral Acropora muricata: A controlled experimental approach

High phosphate uptake requirements of the scleractinian coral Stylophora pistillata

Phosphorus metabolism of reef organisms with algal symbionts

Sponge symbionts and the marine P cycle

Phosphorus sequestration in the form of polyphosphate by microbial symbionts in marine sponges

"Our crystal clear aquaria come nowhere close to the nutrient loads that swirl around natural reefs" Charles Delbeek
Timfish is offline   Reply With Quote