Magnesium settling in dosing reservoir

catchandreleas · 04/09/2020, 08:44 AM

So I just set up a dosing pump, I’m using a glass container for the additives.

I filled the glass container with brightwell magnesium yesterday and this morning it has settled to the bottom of the solution. The bottom 3/4” is cloudy and thick, while the top is 6” is clear.

What have I done wrong here?

Four drachma · 04/09/2020, 08:49 AM

I put some small pumps in my dosing containers, to keep the solution mixed.

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catchandreleas · 04/09/2020, 08:55 AM

I figured with a pre mixed solution such as this it wouldn’t be required. I never had to shake the bottle or anything when I added it straight from what is was sold in

catchandreleas · 04/09/2020, 08:56 AM

I did add the small amount left of my Red Sea magnesium to the brightwell when I filled the dosing container. Perhaps it did something? Seems unlikely.

wrott · 04/09/2020, 09:39 PM

If the solution is too concentrated, cooler temperature can precipitate salts.
Try diluting with ro water, like 3:1, see if it clears.
Also, if it is basic from residual NaHCO3 it will ppt, add acetic acid to solublize.

catchandreleas · 04/10/2020, 03:23 PM

Quote:

Originally Posted by wrott

If the solution is too concentrated, cooler temperature can precipitate salts.
Try diluting with ro water, like 3:1, see if it clears.
Also, if it is basic from residual NaHCO3 it will ppt, add acetic acid to solublize.

Mixed it 50/50 with RO and it’s crystal clear. Great call. Thanks for the help!

04/09/2020, 08:44 AM	#1
catchandreleas Registered Member Join Date: Apr 2010 Location: Canada Posts: 127	Magnesium settling in dosing reservoir So I just set up a dosing pump, I’m using a glass container for the additives. I filled the glass container with brightwell magnesium yesterday and this morning it has settled to the bottom of the solution. The bottom 3/4” is cloudy and thick, while the top is 6” is clear. What have I done wrong here?

04/09/2020, 09:39 PM	#5
wrott Registered Member Join Date: Mar 2004 Location: Alabama Posts: 2,912	If the solution is too concentrated, cooler temperature can precipitate salts. Try diluting with ro water, like 3:1, see if it clears. Also, if it is basic from residual NaHCO3 it will ppt, add acetic acid to solublize. __________________ OK, but where does the meat go! ------------------------------------------------ 120g SPS, 125g mix, 56g FOWLR, 20g qt

04/09/2020, 08:49 AM	#2
Four drachma Registered Member Join Date: May 2015 Posts: 134	I put some small pumps in my dosing containers, to keep the solution mixed. Sent from my iPhone using Tapatalk

04/09/2020, 08:55 AM	#3
catchandreleas Registered Member Join Date: Apr 2010 Location: Canada Posts: 127	I figured with a pre mixed solution such as this it wouldn’t be required. I never had to shake the bottle or anything when I added it straight from what is was sold in

04/09/2020, 08:56 AM	#4
catchandreleas Registered Member Join Date: Apr 2010 Location: Canada Posts: 127	I did add the small amount left of my Red Sea magnesium to the brightwell when I filled the dosing container. Perhaps it did something? Seems unlikely.