trrouble shooting - algae came back

[natureAddict]

took pic this morning. the macro has been thinned out to encourage the scubber to grow more.
Wondering if i should clear the macro completely? it was used as a back up when the scrubber was developing.

the sun penetrates right thru to the back of the macro algae so actually there is no dead macro.


this is the close up of the screen. dont know if it helps in the anlysis


back of the screen thats not facing the sun, but still bright enough for algae growth

Your comments on sun-powered ats r most welcomed.

[natureAddict]

tested Red Sea nitrate '0'ppm, Salifert phosphate '0'ppm

[SantaMonica]

I would remove the macro; the weak photosynthesis on the back side is not helping. You never want weak light anywhere in your filter.

[natureAddict]

tested Red Sea nitrate '0'ppm, Salifert phosphate '0'ppm

so what causes the algae if N=0, P=0?

[SantaMonica]

N and P are not zero. They are below the level of the test.

[natureAddict]

so what causes the nuisance algae in the main tank, sump also cus it get alot of sunlight

[natureAddict]

scrubber after 7 days before wasshing

front of scrubber facing sun


back of scrubber, indirect sunlight

the light patch has been roughened up.

Hope the pic help with the analysis

[SantaMonica]

Remove all macro.

Let the screen grow 14 days.

See how it it in a month.

[natureAddict]

1. should i remove the slime n macro/ caulerpa algae in the main tank or wait for it to disappear?

2. i dose sodium bicarbonate, calcium n magnesium regularly, that doesnt contributed to the nuisance algae, correct?

3. i have read that potassium contributes to nuisance algae, so i stop dosing this, correct?

thanks bro

[kerry]

A couple guys on here are experimenting with potassium and one said it made his algae darker. Still nothing conclusive yet. The other things are fine and need to be dosed.