Is this dinoflagellates or diatom?

[Indeco]

Saw this yellow patches at my refugium after my chaeto showing sign of dying

Is this dinoflagellates or diatom? May I know what can I do to eliminate this.

 

[Uncle99]

I see no pics

 

[AlSimmons]

The link below might help.

https://www.reefcleaners.org/nuisance-algae-id-guide

 

[mcgyvr]

(RC Forum is not showing the images but the links are there if you reply/quote)

Thats very minor diatom growth and a bit of detritus..

That is not the reason your chaeto is dying..

Give us detailed information about your tank..
Age of tank?
Nitrate level?
Phosphate level?
and the type of lighting you are using on the chaeto?

Its likely that your tank is just too new and the chaeto is simply starving as the tank isn't mature enough to sustain its growth..

 

[Indeco]

so this is a diatom not dinoflagellates?

yes, this is not the reason that killed my chaeto but this yellow stuff start growing after my chaeto die off...

my tank is very new, only 2.5 month old

Nitrate = 5ppm
Phosphate = 0.15ppm
Lighting = 24W PAR 38 LED Red bulb

The above nutrient is not enough to sustain the growth of chaeto?