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Phosphate levels


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I've researched and cannot find what my phosphate levels should be for a planted low tech tank.  I've read 1-2 ppm and I've read <.5. ppm and I've read 3-5 ppm.  So which one is it? 

I tested high over 5 ppm but I just scraped my tank for algae and probably had some of that in the water column.  Would that possibly cause my reading tio go way up?

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On 3/29/2024 at 1:01 PM, Mmiller2001 said:

Drop it down to 2 or 3ppm. If you see GSA, raise it 1ppm until the GSA goes away.

Wouldn't 2-3ppm only be for a heavily planted tank with high light?

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On 3/29/2024 at 3:21 PM, Mmiller2001 said:

No, I’d go 5 if higher light. I’m at 10ppm in my own tank.

Wow! Im at 2 every other day, (plus whatever is in my tap) for a moderately planted with medium light. 2-3ppm for a sparsely planted  tank just seems high.

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On 3/29/2024 at 3:35 PM, Mmiller2001 said:

How often do you water change and how much 

50% most sundays, although im starting to skip a week now and then according to my tds & available time.

Edited by JoeQ
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On 3/29/2024 at 1:39 PM, JoeQ said:

50% most sundays, although im starting to skip a week now and then according to my tds & available time.

So you dose 2ppm three times a week. So that’s an accumulation total of 12ppm. 

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On 3/29/2024 at 3:43 PM, Mmiller2001 said:

So you dose 2ppm three times a week. So that’s an accumulation total of 12ppm. 

Ahhhhhh I get ya, you were talking weekly total, I  break it down per dose that covers 2 days.

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