Iron dosing in presence of phosphate

[Tidywork]

I think it very unlikely the iron killed fish. People lose fish all the time for unknown reasons. That said, this dose of iron was not intended for a marine tank and is much more than I would dose.

That product is 10,000 ppm iron. He dosed 5 mL per 200 l. So the dose was 0.25 ppm. I dosed my tank about 1-2 ppb, or a hundred times less.

Please can you show me this calculation ? I don’t know why I think 5ml in 200l is 2.5ppm

 

[Dennis Cartier]

Please can you show me this calculation ? I don’t know why I think 5ml in 200l is 2.5ppm

I get the same as Randy ( 5 ml / 200000 ml * 10000 ppm = 0.25 ppm )

Though let's see what Randy says.

 

[Randy Holmes-Farley]

Please can you show me this calculation ? I don’t know why I think 5ml in 200l is 2.5ppm

As Dennis notes, if we assume the solution is 10,000 ppm, and the dilution is 5 mL into 200,000 mL, the concentration becomes:

10,000 ppm x 5 ml / 200,000 mL = 0.25 ppm