Algae Issues and ID

[JBS]

Hey Everyone,

I’m having some algae issues and trouble keeping this in check.

I’ve scrubbed with a tooth brush and it doesn’t really want to come off. I siphon it out of the sand and have been doing about 20% weekly water changes.

Last Weekend:
P04: .09
Alk: 129ppm
NO3: 0ppm
Ca2+: 500ppm

This Weekend:
P04: .08
Alk: 108ppm
NO3: 0ppm
Ca2+: 500ppm

I’ve been using kalkwasser in the ATO and added more today.

Any ideas on how to get this to go away? I might try reducing the photoperiod and shift the spectrum to more blue.

 

[saltyfilmfolks]

How's the cuc in the tank?
It's rodi I assume?