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Thread: Phosphate
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03-05-2025, 09:22 AM #1Senior Member
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Phosphate
Just done a full set of water tests and my phosphate is a little high at 2.0 mg/l (Colombo liquid test )
Double checked then checked straight out of the tap and after the 3 pod all 2.0
What can I do to lower it please people first thing to mind is water change but that ain't gunna help this time !
Sent from my SM-S918B using Tapatalk
Freddyboy the legend
"we are water keepers first"
Johnathan
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03-05-2025, 08:20 PM #2Extreme Koi Member
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Phosphate is not normally a problem for koi.
They are quite happy with high readings. It does mean your pond will be liable to getting blanket week. Blanket weed treatments will lower it otherwise you will need an RO system.
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04-05-2025, 08:32 AM #3Senior Member
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I've found Aquasource Resolve used once a month has kept Phosphate levels down and blanket weed completely eradicated.
7500 litres
Filtreau combi with uv.
Some koi
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