how big are your plants now? if you keep them healthy they should produce any number between 200g-1000g (or even more extreme), you are aiming for 600g but for a first grow that is a tough ask. never used biobizz sorry.
what you have working in your favour is a high yielding strain and all the same type. are they all from seed or a cutting?, if from seed you will no doubt get many different style plants even though they are the same strain, these are phenotypes that decide how they like your environment, some do better than others.
for best possible yield in the minimum time frame grow many small plants of the same cutting and try to keep it all as level as possible, place small plants on the inside and taller plants on the outside so they can get some decent light, some trimming of the very lowest buds and stems to encourage better air movement and overall plant health/appearance. keep the plants supported if possible or avoid moving them altogether after week 3 of flower.
1m square is small to grow 13 plants so they may stretch a bit , try to keep them from growing into each other too much and leaning against the side of the tent. keep good airflow around the plants, as they breathe they are transpiring water which stagnates then attracts moulds etc.
i see no filter in your set-up.
stinky stinky
go vert like dst!
!! I am pretty happy with that ........... All the work building a room, baby sitting , trying to get shit right the first time was only possible because of RIU , So big thanks everyone for the help and insight and some good bullshit along the way !!! 
.......... now can I do it again 
