Lathanium Chloride Dosing Calculation

[dvgyfresh]

I tried both, no effect so far. I am running a constant flow GFO reactor, and an algae scrubber. Algae scrubber goes through weekly collection, full of nice green hair algae.

what’s the nitrate level? I’ve found not having a good balance of high nitrate to high phosphate will result in phosphate ever increasing

 

[Reefer1978]

what’s the nitrate level? I’ve found not having a good balance of high nitrate to high phosphate will result in phosphate ever increasing

It's deff not even, it's at 35. I want to get it into the correct redfield ratio, so I am aiming for .35P.

 

[Pistondog]

I tried both, no effect so far. I am running a constant flow GFO reactor, and an algae scrubber. Algae scrubber goes through weekly collection, full of nice green hair algae.

Even with the lc it will be a slow process as the rock will release po4 when the water concentration is lowered.

 

[Reefer1978]

Even with the lc it will be a slow process as the rock will release po4 when the water concentration is lowered.

Agreed.

 

[dvgyfresh]

Maybe try phosguard , it’s another solution that’s worked for me when my ratio is out of wack for phosphate

 

[Reefer1978]

Maybe try phosguard , it’s another solution that’s worked for me when my ratio is out of wack for phosphate

Tried it, concerned with leaching Aluminum per Randy's past articles.

 

[Pistondog]

It's deff not even, it's at 35. I want to get it into the correct redfield ratio, so I am aiming for .35P.

The ratio is not important. But having some of each is.
5 to 10 ppm nitrate
> 0.1 ppm phosphate

 

[Reefer1978]

The ratio is not important. But having some of each is.
5 to 10 ppm nitrate
> 0.1 ppm phosphate

I want to use same ratio, but higher amounts. Worst case I will go to what you are suggesting, I am aiming for ratio for now.

 

[Randy Holmes-Farley Verified Community Expert]

I honestly think chemi pure blue and GFO is all that is needed and maaaybe a couple drops of LaCl - I would say you are thinking too much about the #s before having a biome in place (no coral) but you are probly super experienced so don’t let me deter lol

Chemi pure blue will have almost no effect as it will not bind phosphate from seawater. . The elite will as it contains GFO.

 

[Randy Holmes-Farley Verified Community Expert]

It's deff not even, it's at 35. I want to get it into the correct redfield ratio, so I am aiming for .35P.

That’s a wasted effort. Bring them both to desirable ranges.

 

[Reefer1978]

That’s a wasted effort. Bring them both to desirable ranges.

Welp I should say .35 and 35 is my desired range. :-)

 

[Randy Holmes-Farley Verified Community Expert]

Welp I should say .35 and 35 is my desired range. :)

Ok, that’s fair.

Reason to go slow is that more people seem to have issues from lowering phosphate than from the high levels to begin with.

 

[dvgyfresh]

Chemi pure blue will have almost no effect as it will not bind phosphate from seawater. . The elite will as it contains GFO.

Man wrong one lol good catch I’ve been out of the game too long

 

[Reefer1978]

Ok, that’s fair.

Reason to go slow is that more people seem to have issues from lowering phosphate than from the high levels to begin with.

Thank you Randy, will go with current dose then and just wait.

Man wrong one lol good catch I’ve been out of the game too long

I figured you meant Elite that has some GFO in it, no worries. But it's a tiny dose of GFO.

 

[Reefer1978]

@Randy Holmes-Farley I believe I saw you mention in some posts that Phosphate tests are impacted by Lanthanum dosing? How should a test be done? I am running GFO and dosing Lanthanum (small dose) but I am not seeing Phosphates going down fast enough on a red sea test. Barely changed colors on a high-range test.

 

[Randy Holmes-Farley Verified Community Expert]

@Randy Holmes-Farley I believe I saw you mention in some posts that Phosphate tests are impacted by Lanthanum dosing? How should a test be done? I am running GFO and dosing Lanthanum (small dose) but I am not seeing Phosphates going down fast enough on a red sea test. Barely changed colors on a high-range test.

I don't recall what I may have said, but I think the only possible issue is if particulates of lanthanum phosphate get into the test and dissolve during the assay (it has a low pH), giving a false high reading.

But it is expected that calculations are a very top end of what you may observe by testing because of desorption from rock and sand as you try to lower the level. The same happens in reverse when you try to raise phosphate. One ends up needing to bind or add far more than expected to move phosphate levels.

 

[Reefer1978]

I don't recall what I may have said, but I think the only possible issue is if particulates of lanthanum phosphate get into the test and dissolve during the assay (it has a low pH), giving a false high reading.

But it is expected that calculations are a very top end of what you may observe by testing because of desorption from rock and sand as you try to lower the level. The same happens in reverse when you try to raise phosphate. One ends up needing to bind or add far more than expected to move phosphate levels.

Is there a formula of binded phosphates to water dilution to figure out how long removal may take?

 

[Randy Holmes-Farley Verified Community Expert]

Is there a formula of binded phosphates to water dilution to figure out how long removal may take?

Not really, as you don't know the available calcium carbonate surface area in your aquarium. But in a reverse experiment, using some bare rock, it took many ppm of phosphate to get phosphate to stabilize at 0.1 ppm. If you tried to remove that same phosphate by water change, it would take many 100% changes.

 

[Reefer1978]

Not really, as you don't know the available calcium carbonate surface area in your aquarium. But in a reverse experiment, using some bare rock, it took many ppm of phosphate to get phosphate to stabilize at 0.1 ppm. If you tried to remove that same phosphate by water change, it would take many 100% changes.

As always, thank you Randy!!!

 

[Randy Holmes-Farley Verified Community Expert]

As always, thank you Randy!!!

You're welcome.

Happy Reefing. :)