What causes diatoms?

Sdoutreefer

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Just curious, but what is the main cause of diatoms? My tank has been running since november 2012, and I have had diatoms on my sand bed since its been running. Everything else is fine oter than the ugle sand.
 
Too many nutrients in water. Need to test water for nitrates and phosphates. Overfeeding is usally main cause.
 
It could be low-flow areas Too many fish Bad feeding habits Lights on too long Sun on tank Hi nitrates hi phosphates but I personally would start with the waterflow Good luck


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From my limited time on this forum, this is one of the most often asked question. You are not alone!

I sure hope this is ok, this is the best piece of info I have ever seen on Dinoflagellate. I know you asked about diatoms, but frankly I can't tell the difference even after reading the second article. I can tell you from presonal experience excess dinoflagellates will kill fish, snails, crabs. I followed the lessons learned exactly and wiped them out. Best of luck.

How I beat dinoflagellates, and the lessons I learned ? Advanced Aquarist | Aquarist Magazine and Blog

Aquatic Science: Diatoms vs Dinoflagellates and Marine Plankton Benefits
 
Silicates are the main cause of diatoms. Diatoms mainly hit a new tank or areas with high silicates in the water. I doubt you have diatoms, there are other algae that look like the same like dinoflagellates. You can get d/i cartridges that target silicates
 
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I dont think overfeeding is my problem, but could be a possibility. I think I may not have enough flow. My tank is a 40b with an mp10 for water flow.. Theres only a few dead spots but hear having as little as a couple of dead spots can be bad for a tank.
 
Also thanks to everyone sharing knowledge on this problem. Im not sure if my photoperiod is too long. I use Radions which come on at 9am (deep blues to all blues) and ramp up to 75% (from 12pm-6pm) and then ramp down. Lights are completely off by midnight. Blues turn on around 930pm. I do run GFO. Can this have anything to do with the diatoms? The diatoms are the only nuissance algae growing or that I can see growing. I syphon my sand every week when I do my water change in hopes of cleaning it up...
 

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