What Is Your Phosphate Level?

Janice

Member
Joined
Oct 15, 2016
Location
Mississauga
Hi: We have been using the Hanna Phosphate Checker on our two tanks. Our 32 G is 0.043 ppm and our 16 G tank is at 0.034 ppm. I know the recommended level is less than 0.03 ppm.

I am curious as to what type of fluctuation long time reefers see in their phosphate levels?

As or 32G was virtually empty after everything was killed with a bleach sabotage, it accumulated some algae growth (which I hate). So we left it empty until this week, when we added a few corals. We have not added any fish yet-although we did add a sand sifting starfish, a cleaner shrimp and a peppermint shrimp, as well as a porcelain blue crab, some hermit crabs and 2 Super Tongan Nassarius Snails. We have also been adding more Rowaphos GFO weekly, and the algae has still not died-although I have not noticed any new algae growth. Does the PO4 level have to be at 0.03 for a long time to get the algae to die?? Or is 0.03 just the goal, that very few actually reach? What do I have to do to kill off the rest of the algae?
 

AdInfinitum

Super Active Member
Joined
Jan 12, 2012
Location
Thorndale, Ontario
If you are reading above .03 and have actively growing hair algae then you can safely assume that your actual levels are double what you read as the algae strips the phosphate from the water rapidly. Near zero on an ultra low range Hanna is definitely realistic but it will take time for all of the phosphate that is banked in your rock and substrate to be exhausted...
 
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