Phosphate/ Algae connection? - The Planted Tank Forum
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post #1 of 3 (permalink) Old 08-04-2014, 06:45 PM Thread Starter
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Phosphate/ Algae connection?

Reason this comes to mind is the Toledo, Ohio water shutdown. Water is unsafe to drink or shower due to toxins from an excessive growth of algae. The algae is blamed on excessive sewage and farm fert runoff.

So what is the current thinking on phosphate causing algae in the tank? Is it a problem that should be considered or not a problem?
I dose Osmocote and it bumps my phosphate pretty heavy. I don't worry too much about algae but if it is a problem, how does one deal with it while using DIY tabs?
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post #2 of 3 (permalink) Old 08-04-2014, 07:06 PM
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In a body of water where there is very little plant mass excessive phosphate would cause algae issues but in an aquarium where there is a large amount of plant mass I don't see any issues. I have really high levels of PO4 in my tank and it causes no algae issues. For years this has been repeated that high levels of phosphate are the cause of algae but many have proven this wrong by dosing it at elevated levels with no algae outbreaks.

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post #3 of 3 (permalink) Old 08-04-2014, 09:06 PM
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FWIW, I add about 3ppm per week in a medium light tank with no algae issues.
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