Lanthanum Chloride - recommended micron size?

[r0cksteady]

Thanks again for the feedback. Im slightly confused by what youve said as my understanding was the point of the filter sock would be that it 'can' actually catch the Lanthanum Chloride without it being bonded but I have taken what youve said onboard and will dilute.

I fight with phosphate around the 0.2-0.3 mark which is obviously too high. I have a 550g system and dont have a dosing pump (as yet) if I just gravity fed it mixed with some RO/DI would this be suffice.

What ml would you recommend I mix with RO/DI? And what would the dose rate be? A few drops a second? 1 gallon per day? etc?

Thanks for taking the time to respond, its really appreciated.

 

[HighlandReefer]

The filter will not catch the lanthanum chloride, but will help catch the lanthanum phosphate which precipitates out.

The amount of lanthanum chloride you add will depend on your tank phosphate concentration and the size of the container you add LC to. If you have a 1 gallon container for example, then you would add the amount to reduce the phosphate for 1 gallon, then allow it to throughly mix in this 1 gallon and allow the precipitants to form. Then you run it through the filter to remove the lanthum phosphate. This is why when using LC it is recommended to treat the water in a side loop designed to allow the process to happen properly. Many hobbyists remove the tank water and put it in a large container and then treat this volume and filter it and then return it to the tank.

 

[r0cksteady]

Hey Guys,

Sorry to resurrect an old thread but I was wondering how long should I leave the Lanthanum Chloride in a bottle mixed with RO/DI before I start drip feeding it into my skimmer? Ie. How long does it take for it to turn from Lanthanum Chloride into Lanthanum Phosphate? And is there a suggest rate at which it should be dripping into the skimmer\sump\filter sock? eg. 1 drop per second?

 

[UVvis]

...I was wondering how long should I leave the Lanthanum Chloride in a bottle mixed with RO/DI before I start drip feeding it into my skimmer?

You can leave it in there for a very long time. However, with CO2 in the air, the lanthanum ions will eventually find carbonates to precipitate out with. If you plan to store it for a long time, drop the pH a bit.

How long does it take for it to turn from Lanthanum Chloride into Lanthanum Phosphate? And is there a suggest rate at which it should be dripping into the skimmer\sump\filter sock? eg. 1 drop per second?

Lanthanum chloride dissociates in water, so in solution, you just have lanthanum ions. Reaction time with phosphates/carbonates is somewhere in the range of 90-ish seconds. I'd recommend dosing it into your skimmer.

Dosing rate will depend on your Lanthanum solution concentration, tank volume size, system size, flow rates, phosphate levels and your target phosphate levels after treatment.

I'd recommend starting slowly and doing just a couple drops at first, and giving it a while to watch your system for adverse changes and to make sure your filtration is working well. Then depending on the above factors, figure out your dosing plan.

 

[birddog486]

Hey Guys,

Sorry to resurrect an old thread but I was wondering how long should I leave the Lanthanum Chloride in a bottle mixed with RO/DI before I start drip feeding it into my skimmer? Ie. How long does it take for it to turn from Lanthanum Chloride into Lanthanum Phosphate? And is there a suggest rate at which it should be dripping into the skimmer\sump\filter sock? eg. 1 drop per second?

Depending on how diluted your lanthanum solution and how much phosphate is in your system will determine how fast you should be dosing.

If your phosphate level isn't above .10 you realistically may only need one drop of your dilute lanth. per water volume in the skimmer. Such as one drop every 1-2 minutes. otherwise once the lanth. is added to the skimmer and the available phos is locked up, the rest of the lanth is going to go out and react in the tank or sump.

 

[birddog486]

heres a copy of what i posted in another thread:

After reading a bunch of the lanthanum chloride post I got the Seaklear phosphate reducer and a 10 micron sock a couple weeks ago. Yesterday I finally got up the nerve to dose the tank and WOW... that stuff works.

I mixed 2.5ml lanthanum into 1/2 gallon of RO/Di and dripped it really slow into my overflow in the tank, then It flowed into the sump through a 10 micron filter sock.

I tested this morning twice and both times the checker reads 0.00

This is in 250+ water volume

 

[UVvis]

Cool,

What was your pre-lanthanum dosing phosphate value?

 

[birddog486]

Cool,

What was your pre-lanthanum dosing phosphate value?

It's been staying between 0.08-0.10 even with the use of phosban. Im tired of of the GHA and the cost of GFO, thats the reason for the Lanthanum.

I may have to plan on a dosing regimen if my rocks and sand start leaching PO4 back into the system but I haven't tested that yet. If I do it's going to be a very small amount.

 

[carlosdeandrade]

Anyone else using LaCl3. Any bad experiences with the product?

 

[RegalAngel]

Anyone else using LaCl3. Any bad experiences with the product?

http://reefcentral.com/forums/showthread.php?t=1474839&highlight=lanthanum

 

[Dimorb]

Problem with lanthan chloride going into the aquarium water.

Problem with lanthan chloride going into the aquarium water.

Hello everybody.

I'm having some trouble hope you can help.

I dose lanthanum chloride into my pipe work that goes down to a clarisea sk5000 roller filter after the filter the water goes into the sump - skimmer - filters etc..

I dilute my seaklear commercial 7 ml lanthanum chloride / 1 L of water. Dose it over 24 hours distributed on 150 occasions a' 3,6 ml/dose.

I get the wanted effect in lowering phospates but it also shows on ICP testing and the amount in the water is rising. 4 ug/l last time and 11 ug/l this time.

What do you recommend? Maybe the clarisea sk5000 isnt suitable for this?

I've also noticed an increase in other of other substances like aluminium, lithium and barium do you know if the lanthanum could "free" other substances?

 

[Vinny Kreyling]

The above user had a 10 micron sock. Is the filter paper of the same micron or larger.
As I understand it filtering should be with a fine micron.
As far as purity I have no idea.

 

[bertoni]

I don't think lanthanum chloride dosing would add elements except as impurities in the product. How much of a rise are you seeing?

 

[Dimorb]

The above user had a 10 micron sock. Is the filter paper of the same micron or larger.
As I understand it filtering should be with a fine micron.
As far as purity I have no idea.

The producer of the roller filter told me that it should be equal to 20 micron socks.

 

[Dimorb]

I don't think lanthanum chloride dosing would add elements except as impurities in the product. How much of a rise are you seeing?

I don't think it would add unless the product is contaminated - I've sent ICP o the product so time will tell.

But what I ment was - could lanthanum cloride in some way contribute to the rise in some other way?

Perhaps make other substances react/release or even animals/algue etc?

 

[bertoni]

Perhaps make other substances react/release or even animals/algue etc?

It might be possible, but it seems very unlikely.