Diatoms

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Hi all,

Recently lowered my No3 down to around 1 over a period of a few weeks, from around 30+, and po4 from 0.12 to 0.08 tank is mainly LPS. I have done this using NOPOX, however recently I’ve started getting diatoms in certain areas that just won’t go away. I’m sucking up with a turkey baster as soon as it appears but what could be causing it ? Equipment in tank seems to get a brown dusting too, not visible on glass (although cleaned regularly) but surface skimmers and wave makers get brown within a day or two of cleaning.

Chemistry as follows;

PO4 0.08
N03 1
N02 0
Ammonia 0
Calc : 500
Mag: 1400
Alk 11.2
Salinity 35

Is the po4 and no3 out of balance ? As I didn’t get this when N03 was elevated (but did get GHA)

Recently also replaced TMC illuminair lighting to a pair of Radion G2, slowly acclimated to 35% overall intensity. But I believe diatoms have appeared as a result of lowering N03.

Any advise would be greatly appreciated- all inhabitants seem perfectly fine

Matt_toynton

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Reply #1

Just cleaned the tank and looked like some of it had bubbles, so would suggest this is more likely to be Dino’s than diatoms. Tank is pretty mature over yrs running. Can’t really see it now too much but will post another pic tomorrow when it’s back

Asco1104

  • Tim
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Reply #2

Hi

Diatoms feed of silicates so you po4 and no3 reduction won’t be the cause of it is diatoms.

Stringe snot with air bubbles at the end could be diatoms and lowering your nutrients could have caused it.

What you need to do is blow the rocks with a turkey baster, take a glass of water out just after doing that, get another glass and strain the water through a paper towel in to the empty glass and wait to see if it reforms into stringe snot. If it does it’s dinos.


Tim

Matt_toynton

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Reply #3

Hi Tim

Thanks for the tip, yep it sure does, so looks like Dinos then.

Are they likely to burn there selves out after a while, or do I need to raise NO3 again do you think ? Or is the ratio of PO4 to N03 the problem


Asco1104

  • Tim
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Reply #4

You could try letting them rise again and see what happens.

There are different strains and I got rid of mine by adding Copepoda and phytoplankton to put compete it.


Tim

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