why is my phytoplankton not dark like others

[Cal_stir]

are you using fertilizer?
are you culturing rotifers close by, if contaminated with rotifers they will eat as fast as it grows.
light for 16 hrs a day?

[donkey77]

no rotifers giving f2
light 16hrs

[Cal_stir]

what kind of light?

[donkey77]

i think its a led it's the kit from mamroo200

[Cal_stir]

I think they are flourescent, which should work fine.
What about temp., and you have an air line running like a slow boil.
How much f2?

[donkey77]

temp is about 72 74
airstone to a slow boil
this is my first batch
3ml f2 for about 3 gallons

[Cal_stir]

I would split it and put a little more f2 this time, an extra ml, are you using tap water or RO?
I used filtered water ( just after the carbon block of my RODI unit), salinity 1.019, don't use RODI

[The Guy]

Originally Posted by donkey77

temp is about 72 74
airstone to a slow boil
this is my first batch
3ml f2 for about 3 gallons

I was told not to use an air stone only a hard tube open ended at the bottom of the bottle, also I use a 6500 k compact bulb.
I'm new to this so we'll see how it goes.