how much PO4 - The Planted Tank Forum
 
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post #1 of 1 (permalink) Old 08-19-2019, 06:13 PM Thread Starter
Algae Grower
 
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how much PO4

The only issue I have in my tank, is some GSA on plants leaves.
in my 300ltr planted tank I inject CO2 from PH 7.43 to PH 6.10.
My lights are medium 4 T539W.
I use EI and do weekly 50% water change.
I know to avoid the GSA, I must set higher the CO2. I already did this for a while as I drop the Ph around 1.3
Also I add more and more PO4 to eliminate the GSA. These days i add 5.4 ppm weekly.
The day before water change i have 2ppm of PO4, and the next day 0.5 ppm of PO4.
So can i go higher by adding more PO4 or is dangerous???
fitos100 is offline  
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