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Originally Posted by Kurt03
Do you feel like elevating no3 and po4 made a difference for you? Unless it's just timing I feel like it's the single thing I've done with the biggest impact. Could just be timing though.
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No. And definitely yes.
Higher N and P did not make dinos stop. They do just fine with lots of N and P, but so does algae. Elevated N and P was crucial for growing lots of algae in my system, which provided large diversity of grazers of dinos, and the algae also consumed trace elements that the dinos needed and slowed dino growth.
So yes, elevated N and P was important.
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If they have lost there theca are they dieing? I have a bunch that I don't see a theca around.
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Without theca, they can probably be presumed dead. However, some kinds are naturally unarmored ("naked") like amphidinium. Maybe symbiodinium too? Ostis, it's hard to see the theca unless it comes off, or is in the process of coming off. Some kinds, you can see the theca and grooves in it while it's in place.