[manmetbril]

Hi all,

Long time ago I did amateur chemistry, still have all the equipment but not active anymore.
But now I am trying to remove phosphate from my well water (because I want to use it for my pond)

The well water contains 4ppm of phosphate (detect with easy pond test kit)
That is way to much and will result in an algae bloom.

I found that using electrolysis of aluminium anode and cathode will remove the phosphate.
It should generate almost insoluble aluminium hydroxide I believe.
After 24 hours of electrolysis with 5v in a 1000 liter tank there is no phosphate detectable anymore.

But I would like to test how much of soluble aluminium compounds are left in the water,
They can be toxic for aquatic life is what I understand.

Can anybody point me in a direction on how to test for aluminium?
(I can not find normal priced commercial test kits)

Hope this is a question I can ask on this forum.

Kind regards,

manmetbril