I am still struggling with keeping po4 down. Its been hovering around 0.2 ppm while no3 could be as low as 0 when I was using biopallets. After switching to Zeo for a couple of months, the ratio remains unbalanced. Couldn't help it but to use rowaphos.
The root cause of the high po4 could be due to leeching from rocks. Besides the root cause, I think it should be fine to bring down po4 to a level that equates to the Redfield ratio of 16:1 (no3[emoji14]o4). After that point, I guess the zeo system will take over the task of maintaining the low nutrient.
Right now I am still swearing by rowaphos to bring down the po4 by a weekly dose of 10 tsp. Monitoring the po4 levels weekly, I still get a rise in po4 if I missed out the weekly change.
Will still be using the rowaphos until I see a stabilized po4 level...[emoji19]
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