.8) not too sure on size of container, probably about 10-15 litres
next time; don't veg in such a large container. 3-5 liter would be plenty. Then transplant when root-bound.

I use a simple granular, mix with water 20-20-20 NPK nute in veg. & a little blood meal mixed into the soil.

(don't know what 'bat special' soil is?)(is that 250 light, HID?)

Good Luck