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hasan06
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Hi guys When using tropica fertilizer, spot algae does not form, but when using agricultural fertilizer, spot algae does?
What agricultural fertiliser? What’s the make up. Green spot algae is often said to form when there’s insufficient phosphates.agricultural fertilizer,
What ppms are you dosing when using agricultural fertiliser? I'd be willing to bet the micros (especially Fe) will be higher.Hi guys When using tropica fertilizer, spot algae does not form, but when using agricultural fertilizer, spot algae does?
I've seen some debate about that on this forum, and I think I question it based on my own experience also. I definitely think that it's a secondary effect, such as high PO4 binding excess free Fe/other micros. Green spot algae can also be reduced by reducing the iron dosage.Green spot algae is often said to form when there’s insufficient phosphates.
I did the same, increased PO4 from 1 ppm/week to 3 ppm; the GSA seems to be gone. On the flip side, my frogbit index started to reach bear territory; the new leaves seem to be paler. I guess now I precipitate the iron with the increased phosphate:In my expierence it is very simple.
When I was dosing 1 PPM (weekly) PO4 I had GSA. I increased 2-3 PPM and it is just gone.
That would be my guess. It is also my guess for why <"increasing phosphate (PO4---) levels"> reduces GSA. It would take longer for <"this to show in the Frogbit">, compared to the algae.I guess now I precipitate the iron with the increased phosphate
That could be. In that case, this might become a titration game between phosphates and ironIt is also my guess for why <"increasing phosphate (PO4---) levels"> reduces GSA.
Yes, that is one of the ways that "phosphate strippers" work at wastewater plants <"How to Remove Phosphorus from Wastewater | SSI Aeration">.In that case, this might become a titration game between phosphates and iron