Lanthanum chloride

[Denilson]

Hello!
As dilute lanthanum chloride powder?
What is the%?

Very grateful for the response
Att

 

[rwb500]

may i ask where you got the powder? and you will want it very dilute. Much more than is limited by solubility.

 

[Denilson]

Here in Brazil only in foma powder, lanthanum chloride (7H2O) PA-ACS
certesa like to have but it seems that dilution is lanânio to 30%.

 

[bertoni]

I couldn't see a percentage for the lanthanum chloride products in a quick search. I'll try to look more closely tomorrow.

 

[Denilson]

Bertoni,
I did the research would be diluted to 10%, this arises?

 

[bertoni]

I'm not sure what you mean. Is the powder 100% lanthanum chloride heptahydrate? I'll have to look around for more information on products to find a dilution rate.

 

[Randy Holmes-Farley]

Assuming you are able to dissolve it in fresh water, the concentration doesn't matter, only how much you dose, and that might have to be determined mostly by trial and error anyway.

 

[Denilson]

Bertoni,
It is this same powder chloride heptahydrate in 100% of lanthanum, can be diluted with distilled water or 10% RODI?

Randy,
Thanks for the tip

Sorry for the translation, google does not help much

 

[bertoni]

Yes, I think distilled water or RO/DI would be fine.

 

[Denilson]

I found something about lanthanum here, very Legau.
http://www.advancedaquarist.com/2007/2/aquarium

 

[Randy Holmes-Farley]

Yes, Joe uses lanthanum on some big tanks. My understanding is that he currently doses it directly in front of a sand filter to try to make sure to eliminate as much of the precipitated lanthanum phosphate and carbonate as possible.

 

[UVvis]

That is how I use it. Pre sand filter. You get better results of phosphate binding if your alkalinity is on the low side, if not you bind up lots of carbonates. The other helpful side is that the precipitate that forms helps sand filters run a little more effeciently on smaller micron particles. The precipitate is caught very well by sand filters as we have barely been able to detect trace lanthanum in the water column of the tanks.

I use it with tap water that I slightly acidify to burn off the carbonates. RO/DI would be better for mixing. Concentration doesn't matter as much as dosing rate. If your alkalinity is very high, I suspect you waste more lanthanum by binding up some of your alkalinity.

 

[stormrider27]

Is there a thread(s) on how to make a sand filter? I couldn't find any via the search function.

Thanks!
Mark

 

[UVvis]

You probably do not want to use a sand filter on a reef system. They are basically a particulate filter that can support biological activity (nitrate issues). They are great for clarifing water, but that is about it. This might make them less useful for reef tanks where you might want some suspended materials in the water column of the aquaria.

The flows and backpressure issues make them more useful on larger systems, swimming pools, municipal water supplies and the like, where water flow is measured in hundreds or thousands of gallons per minute.