My new tank (with algae problem)

[arashlove]

No problem that is normal.
Maybe start changing water to get the tap water out.
Rodi only

Are you sure? As I said I use RO water for make-up and half of starting water was RO too but now because of evaporating (and adding RO water to the cycle) the ratio of tap to RO water is decreasing.

 

[drernesto Verified Sponsor]

It appears to me Cyanobacteria and diatoms together and +1 on using only RODI 0 tds water...

 

[twilliard]

Yes evaporation does not remove heavy metals they stay in the tank.
Tap water metals and elements are still there being consumed by any algaes or diatoms