can I add this to top off water?

[boxfishpooalot]

Randy, I have some ro water with nothing in it(just H20)

I recently put some mangesium sulphate inside it to slowly drain to the tank raising magnesium.

I want to put in some iron for my macroalgae. Is it possible with the magnesium sulphate in there?

So i got-
ro water
with some magnesium sulphate
Can I add some iron?


Thanks Box :)

[Randy Holmes-Farley]

Chelated iron should stay soluble in that solution. :)

[boxfishpooalot]

How much should I put inside for my macroalgae to grow good?

The top off is a 5 gallon bucket. I see roughly about 2.5 gallons a day top off draining. Wich is full all the time. So i got 2.5 gallons approximately a day draining in the tank.

The iron is derived from ferrous gluconate (Fe+2). The concentration is 10,000 mg/l.

It would help me out if I knew how much iron to add in ml. As I have the salifert syringe handy.

Thanks !

[Randy Holmes-Farley]

I'd dose about 0.25 mL per week that way. :)

[boxfishpooalot]

Wow, the bottle says one cap per week, wich looks like 2ml. Its Seachems flourish Iron for freshwater.

You think thats high for a marine aqaurium?

Im under the impression that iron gets used up so rapidly in the aquarium by photosythetic organisms that .25ml would just dissapear in 5 minutes. True?

[Randy Holmes-Farley]

I do not know what factors determine freshwater dosing, but I would add the amount that I suggested. Each addition will boost the tank to way, way more than natural levels of iron.