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How much phosphates do you actually have?

Have you measured your tap water to see if that is the source of your phosphates?

In general, as long as nutrient levels are balanced, you will not have any issues with algae. Phosphates are required for good plant growth, so eliminating them completely will generally lead to problems.
 

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As Darkblade said, test your tap water. If that's acceptable do a large water change. This is assuming you're using the test kit correctly and it's accurate. Calibrating the test kit will ensure both of those variables are eliminated.

Avoid phosphate removers. Phosphate is a macro nutrient required by plants.
 

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If you are dosing fertilizers that contain phosphates stop. Just dose the other nutrients and the plants can take care of the phosphates.

Definitely test the tap water, though. Find out where the phosphates are coming from.
 

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What problems are you seeing that phosphates could be causing? If no problems, the you probably don't have too much phosphate in the water. When you see a high reading on a test kit, your first assumption should be that the test kit is bad, not used correctly, or being misinterpreted. Only after verifying that the test is likely to be correct should you think about doing something to the tank water.
 

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Discussion Starter · #9 ·
My tap water has very little phophate in it. Its around .3ppm m tank tested over 1 ppmnot using any phosphate reducers should. Just let my tank filter them out or should i water changes to get rid of them?
 

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My tap water has very little phophate in it. Its around .3ppm m tank tested over 1 ppmnot using any phosphate reducers should. Just let my tank filter them out or should i water changes to get rid of them?
One ppm of Phosphate is perfectly fine. The range for EI dosing is 1-3ppm. That's not a problem at all. When you said it was higher than your test I envisioned over 10 ppm. My API kit has a maximum of 10.
 

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You need to figure out how the phosphate suddenly went from 1 ppm to 10 ppm. That is very abnormal. If it is a problem with how you used the test kit, changing water isn't necessary. Are you dosing any nitrates? How much light do you have? Do you use CO2 or Excel?
 

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Not dosing any nitrates. Changed water, also recently moved my tank and still all that crap up off the bottom.i read the test wrong i thought it said one ppm but it was ten ppm. Do i just let the plants take it out.

I use excel
Are you sure your tap water is 0.3 ppm of phosphates then?

You mentioned earlier that you thought your aquarium was 1 ppm of phosphates, but it turned out to be 10 ppm. Perhaps your tap water phosphate levels are also off by a factor of 10?

It would be wise to retest everything, making sure that you are following the instructions carefully. I would also calibrate your test kit with solutions of known phosphate levels (or at the very least, test it on distilled water to ensure that you are getting 0 ppm phosphates) to ensure that your readings are indeed accurate.

If there is lots of detritus at the bottom of your aquarium, it is likely that it would be contributing to phosphates, but more likely, nitrates. I would do some water changes to bring down those levels, and also to remove the detritus that is at the bottom before retesting the water.
 

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Unless you have very low light your plants can only use a tiny amount of phosphates without you also dosing nitrates, and a trace element mix. You haven't said what lighting you use, so I don't know if you need to dose the other nutrients, so the plants can use the phosphates, or if you should just ignore the phosphates.
 
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