DIY Lanthanum Dosing

[PPBlimpy]

Trying to wrap my head around the numbers.
265G /1000L system with Phos at 1.15

Would be dosing LC into skimmer input via dosing head split over 24hrs with a 10 micron sock hanging off the output of the skimmer

Looking to purchase Lanthanum Chloride Heptahydrate and finding on amazon 50G for $60
@ 9G per 500ml rodi

theoretically mixing all 50G LC into a little under 3/4g (.726g or 2750ml) of a gallon of rodi per recipe on first post.

What is the shelf life of 3/4G of this mix? Can I mix it complete, ad to a dosing container and allow my dosing head to drop it into my skimmers input.

At the mix rate listed above what would be a very safe dosing rate per day?

My system is 1000L so 10x the original sample.
Dosing 10ml / day then should remove .047ppm Phos

Is 10ml / day a reasonable starting place? At this rate after 7 days I could see a reduction of .329 ppm not taking into account leaching and adding phosphates on a daily basis with feeding etc.

appreciate any guidance
Ken

Amazon product ASIN B01L9LQPEI

 

[Randy Holmes-Farley Verified Community Expert]

I’d go off the recommendation I made in post 1 about targeting to remove 0.05 ppm per day.

Shelf life is unlimited.

 

[PPBlimpy]

I’d go off the recommendation I made in post 1 about targeting to remove 0.05 ppm per day.

Shelf life is unlimited.

OK so then yes the 10ml per day should net .047ppm daily removal.

Maybe instead of 50G I will find 25G.
275 days worth of LC mix may be unnecessary to have sitting around.

 

[Waldek M.]

Will this product be suitable? I’ve been using the TM product until now, but there is an availability issue?
https://sklep-chemland.pl/pl/lantanu-chlorek-7-hydrat-99-loba-ar-acs-op-100-g.html

 

[Randy Holmes-Farley Verified Community Expert]

That looks suitable, yes.

 

[Waldek M.]

Thanks:)

 

[Randy Holmes-Farley Verified Community Expert]

You’re welcome.

Happy Reefing!

 

[Gundy]

I need some advice. I have a 375 gallon tank with lots of fish and soft Corals. Although my Corals and fish are doing fine, my phosphates are out of control, testing at 2.5. After doing a lot of research and studying this thread, I took Randy’s advice and used his recipe to make a lanthanum solution using the recommended bottle of Lanthanum chloride.



My recipe: 1 ml per 26 gallons of LaCl recipe. 375/26 is 14 ml per day and dissolve 9gms of La Cl in 500 ml and dose 1 ml at a time. I then took this solution and mixed it in 2000ml RODI water to make 2500ml which is a 5X dilution factor. I then figured out I needed to dose 70 mL a day of the diluted solution that would equal the 14 mL of the original lanthanum solution. 70 divided by 24 hours is 2.91 or 3 ml of solution that I am dosing in a 24 hour period by my Dos pump.



I have dosed this solution into my skimmer for the last 3 weeks with no ill effect to any of my fish. However I have not seen any drop in my phosphate level at all. Can someone check my math or tell me what you think the problem might be? Thanks