Phytoplankton density

[alp5747]

I have been growing a few different types of phytoplankton for a few months but I can’t reach the density of the bottle from the vendor.
Mainly Rhodomonas and T-Isochrysis

I run salinity of 32 ppt
Room temperature
1 ml f2 per liter
And around 4000 and 6500k led bulbs

I am not sure if the vendor is running CO2, but if they are that could be the reason for a smaller density

I hope anyone could help me out thanks.

 

[Reefing Madness]

 

[Sdoutreefer]

I have no clue about culturing plankton at home, but am interested. Following along!