Please be diatoms

[Kilo1]

Hey guys newer tank hoping to get a id on this bloom
Pictures of slides come from 4 different spots.

Ammonia 0
ph 8.3
alkalinity 7.8
salinity 1.025
phosphate .07
nitrate 5ppm
nitrite.1
Calcium 400 ppm

1. rock sample slide
2.red algae on glass
3. brown on glass
4. sand growth sample


1 2 3 4

 

[Mikeltee]

The 3rd slide has some diatoms in it. It doesn't appear to be dinos.