Marc, how about another oops.
The 8 ml you are dosing now is for 50 to 60 gallons of volume.
I think you have a little more water then that.
If you read the directions again, you may find you are supposed to be dosing like 4 x that much.
It says
Directions:
For each 50-60 gallons (200 Liters) of seawater.