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Joined: Jul 2008
Posts: 1,094 Likes: 1
Lunker
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Joined: Jul 2008
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i have fertilized my pond 3 times in the last 4 months and each time i get a green scum on the top. it goes away pretty quick especially after a rain.
from time to time my water gets brown. i use bag fertilizer. i think the #'s are 5-20-20. my friend says that when he used bag fertilizer it was the same way for him. now he is using liquid and has a greener color to his water.
is there anything to this?
Scott Hanners
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I wouldn't think liquid and granular fertilizer would be much different for a given analysis. It may take a day or 2 for granular to dissolve, but that's not a real drawback.
Green plankton can turn brownish when it dies off. Have you had a lot of cloudy weather or shade from trees? Leaves from nearby trees can also stain the water brown.
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Joined: May 2004
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Moderator Lunker
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Moderator Lunker
Joined: May 2004
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Green phytoplankton can also give way to brown zooplankton.
"Live like you'll die tomorrow, but manage your grass like you'll live forever." -S. M. Stirling ![[Linked Image from i.pinimg.com]](https://i.pinimg.com/736x/ed/b5/e7/edb5e7f935843b996cf52be593c9ebd2--smoothie-smooth-collie.jpg)
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Joined: Apr 2002
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Moderator
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Field Correspondent Lunker
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Field Correspondent Lunker
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Green phytoplankton can also give way to brown, yellow green, blueish-green, golden brown, and redish phytoplankton. In a lot of instances liquid fertilizer is better than granular fertilizer. I'm not sure right now what makes one work better thatn the other. It has to do with the chemistry of the water and the relationships of the main nutrients, nigrogen, phosphorus and potash. I think in most cases it has to do with the final availability of soluable phosphorus.
Last edited by Bill Cody; 10/27/08 08:11 PM.
aka Pond Doctor & Dr. Perca Read Pond Boss Magazine -
America's Journal of Pond Management
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Joined: Mar 2005
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Moderator Hall of Fame 2014  Lunker
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Moderator Hall of Fame 2014 Lunker
Joined: Mar 2005
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What is your alkalinity ? Have you had you water and soil tested?
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Joined: Jul 2008
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i check it from time to time with the strips from the pool supply place. ph looks to be around 7 and and the alkalinity is about 50 ppm.
should this stay the same during the winter.
Scott Hanners
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