Both plants will be fighting for space and one will beat the other or could even take each other out, if you can transplant one plant.. if not pull one out to allow the other to grow without competition.
Dont mean to sound like a dick but if this is your 3rd or 4th go then things need to change...
I would take all leaves off including sugar leaves... you can leave the sugar leaves on if you wish but when they dry they curl which makes trimming the buds a bitch of a effort especially when you see the trics falling from the leaf to the floor and not much else
Not a problem, i personally have not seen light bleach before but it is very possible, maybe go with the 300w this grow and do a tester with the 600 next time, whats your set up ?
I am using a 300w marshydro in a 80cm by 120cm tent with 4 ak48's.
Considering your height ect i would personally use the 300w and lst your plants to keep them being short...... but that being said 300w led is not massively powerful, you would have better results with the 600w of course but you...
Look good to me! Just get thoes t5's as close as you can without burning them, also get a few 2700k cfl's.. dont trim, tuck the fan leaves behind a few branches and you will be able to get your cfl's very close to the bud sites
Cut the plant a couple of inches above the base and dry the whole plant, takes a bit longer to dry but is very beneficial and will stop flash drying, but everyone to their own, just need a dark semi airy place and you will be fine
Put some cling film over the top of the pots to help retain moisture, for a auto i would say a week but some conditions can make things take a little longer, at 14 days if nothing then pull them out and start again.
Most likely, i could be wrong but i would have thought the top 2 will end up as your larger cola's then the lower branches will be slightly smaller, but im not 100% , either way it will be interesting to see how she goes.
Growth hormones are telling the plant to grow in every place possible to replace what was gone, however you have topped very early and i would have suggested waiting a few more nodes, but you never know you could end up with some monster cola's