DIY Phosphate Dosing

[Borat]

Hi Borat, Randy,

I have decided to go the Mono Sodium phosphate route as you suggested, do I use the same calculator for mono sodium and the tri-sodum?

1.88g of mono sodium phosphate for 1000ml solution.

Would this still equal .01ppm phos per 100ltr tank volume when 1ml is dosed, or do i need to adjust the amount?

This is more a question for Randy (I am not a chemist - although I can figure things out if needed)..

I ended up buying "Tri-sodium phosphate dodecahydrate" from ebay shop of APC: cost £12.95 for 500g - postage included.

 

[Randy Holmes-Farley Verified Community Expert]

Yes, there are so many other variables that you can’t know or control, it is plenty close enough. Regardless, you may need to dose much more than 0.01 ppm to detect 0.01 ppm remaining after dosing.

 

[e34stx]

I have started to dose p04 as my ulr phosphorus tester reads 0. I have been dosing for a week and now reads 3 ppb. I have noticed my rocks are turning brown with algae. I use a soft brush to remove the algae easily. Should I continue to dose the po4 until I get around 0.05 phosphate or stop because of the brown algae? Thanks