Help with algae ID and treatment?

[tmhickey2023]

Hello All, this algae started to appear a month or so ago. Checked my parameters and all were good. Did my normal water change and it appeared better but only for a short time. It has now spread and only seems to be on the sand bed for the most part. Tank has been up and running for about 14 months. All corals and fish seem great.

Current parameters are:
Ph 8.3
Salinity 35 ppt
KH 8.1
Nitrate 0.4 ppm
Calcium 460 ppm
Phosphate 0.1 ppm
Magnesium 1490 ppm

Attaching photos under white light!
Also, just started the RedSea 4-part dosing program today.
Thanks for any feedback and help.

 

[Reef Wizard]

Hello All, this algae started to appear a month or so ago. Checked my parameters and all were good. Did my normal water change and it appeared better but only for a short time. It has now spread and only seems to be on the sand bed for the most part. Tank has been up and running for about 14 months. All corals and fish seem great.

Current parameters are:
Ph 8.3
Salinity 35 ppt
KH 8.1
Nitrate 0.4 ppm
Calcium 460 ppm
Phosphate 0.1 ppm
Magnesium 1490 ppm

Attaching photos under white light!
Also, just started the RedSea 4-part dosing program today.
Thanks for any feedback and help.

That looks like GHA to me.

How long are lights on and whats CUC look like?

 

[tmhickey2023]

That looks like GHA to me.

How long are lights on and whats CUC look like?

Using 2 RedSea 90’s. They are on 80% blue for about 11 hours total (ramping up for an hour and back down at end for an hour). White lights are at 25%. Again for a total of 10 hours with the same ramp up and down. CUC is a bunch of blue leg hermits, a lot of turbos including Mexican large turbos, a couple emerald crabs.
Thanks for your help!

 

[Reef Wizard]

Using 2 RedSea 90’s. They are on 80% blue for about 11 hours total (ramping up for an hour and back down at end for an hour). White lights are at 25%. Again for a total of 10 hours with the same ramp up and down. CUC is a bunch of blue leg hermits, a lot of turbos including Mexican large turbos, a couple emerald crabs.
Thanks for your help!

Looks like you need to get your hands wet and remove it out of the tank as much as possible

Astrae snails and a sand turner (Conch/or something) are the only ones id add to that list