I noticed my magnesium dropped to 1200 ppm this month. I have a bottle of Fluval Sea Magnesium that claims a dose is 5 ml per 75 L (20 gal) weekly which should provide 5 mg/L.
I have approximately 200 gallons in my setup when you minus rock so the math is easy there.
I’m not sure how to convert ppm to mg/L.
I’m trying to figure out how nuch of this stuff I need to raise 200 Gal about 140 ppm.
I found something that says it’s a 1:1 ratio.
So 50 ml gives me 5 ppm.
1,400 ml should give me the 140 ppm increase I need.
There are only 237 mL per bottle, lol.
Did I do that right? I guess I need to make my own solution.
To make things more confusing the ingredients are Magnesium 75,000 mg/L.
Parts per thousand translates into mg/L. Ppm would be 1000x smaller.
Liquid magnesium supplements are usually very diluted. Randy’s two part method has a magnesium recipe you can use that again is very cheap. If you need some “mag” I have a big bag I can spare some.