What might be causing this...

[fleabilly]

Have not really changed anything in the circulation of my tank.
Co2 has been stable...
Water just moves the surface, but not breaking the surface.
Only thing I can think is I am not getting proper dispersion from my up inline co2 injector.

Any ideas?

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[Ady34]

a labyrinth fish of some sort? Gourami/siamese fighter?

 

[Alastair]

I agree with ady looks like gouramis have built a bubble nest.


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[fleabilly]

4 ottos
2 plecs
10 neon tetras
10 Ember tetras

No gourami

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[Nathaniel Whiteside]

I get this, just co2 or oxygen bubbles forming, more likely oxygen. Definitely nothing to worry about.

 

[AlanTh]

I get this, just co2 or oxygen bubbles forming, more likely oxygen. Definitely nothing to worry about.

My first thought was that it looked very much like a bubble nest - but unusually not in a corner of the tank.

I would say oxygen, not CO2. But could be either I suppose. Or both.

 

[foxfish]

looks like excess protein possibly overfeeding fish.

 

[LondonDragon]

looks excess protein possibly overfeeding fish.

Or plant deficiencies that create a film on the top of the water and trap oxygen and co2 bubbles under it.

 

[Nathaniel Whiteside]

looks excess protein possibly overfeeding fish.

Or plant deficiencies that create a film on the top of the water and trap oxygen and co2 bubbles under it.

Agreed. Probably lack of Co2, causing plants to secrete proteins causing a film on the surface.

Either way don't think we're far off between us

 

[fleabilly]

So as it turn out,
My two ADF have been busy shagging in the tall grass, then laid some eggs in it.

I hear that they tend to eat them, which is great on account that I will be gone for a fortnight, and I was worried about them dying of hunger.

R

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