Algae problem

[malas_reefer]

How are you checking salinity? Looks like it may be lower than you think.

I just use a refractometer…

How are you checking salinity? Looks like it may be lower than you think.

calibrated by my Ro water

 

[malas_reefer]

Nutrients don,t look that bad, phos a little high, what's concerning is your alk, if that's a measurement of ppm, which I think is about 6.2 dkh and your mag is extremely low.

What salt are you using? How do you manage alk, cal and mag ( water changes or dosing )

Back to your original problem, I would manually remove algae, increase algae eating cuc .
Out of interest what did the lfs recommend?

 

[malas_reefer]

I get my salt water from a different lfs to what i go to for tests as they do a better test but is a bit further away… not sure on the salt. They give me phosphate remover and told me to try dosing that

 

[Garf]

I just use a refractometer…

calibrated by my Ro water

Using RO maybe an error, even if that’s how they say to do it. You maybe surprised. You can make a 35ppt calibration solution using table salt and water.

http://www.reefkeeping.com/issues/2004-06/rhf/