Dino or diatom

[Jwill1316]

Hey everyone was hoping to get some help on ID this. These are the best and closest shots I can get with my microscope to. Have had a complete bloom in my tank. They typically will disappear at night and come back as lights ramp up. Tank is almost 6months old and have been fighting 0nitrate 0phosphate in this tank. I did use dry rock with live sand. Paramus are as follows
Nitrate 1ppm
Phosphate 0 or barely detectable
1.024 salinity
Alk stay between 8.0 and 8.1
Ph 8.1
Temp 78
Mag 1468
Calc 460 any help on I'd so I can know how to treat. Or if I should just leave it alone

 

[Bucs20fan]

With it coming back during the day and lighter an night, its probably dinos. Good sign is they will be targetable with a UV. Probably similar to what I had, mostly on the sand. If I had to guess its probably ostreopsis. I had ostreopsis and prorocentrum at the same time and a blackout and using a UV helped me immensely in getting rid of them.

 

[Jwill1316]

With it coming back during the day and lighter an night, its probably dinos. Good sign is they will be targetable with a UV. Probably similar to what I had, mostly on the sand. If I had to guess its probably ostreopsis. I had ostreopsis and prorocentrum at the same time and a blackout and using a UV helped me immensely in getting rid of them.

Ok thanks for the input im at a loss

 

[mjw011689]

Diatoms also get lighter at night, but i agree it looks a bit thick for just diatom algae. Probably the start of Dino’s. And the fact that your nitrates and phosphates are basically undetectable tells me it’s probably dino. Bring up the phosphates, and once you are able to maintain 0.01-0.03 cut the lights either all the way off for a couple days or run blue only for a few hours for a week or so. The blues worked for me and my tank was NASTY with dinos