Hey havest i'm also from BC, this season has been great to me so far I was able to plant in the middle of April. I do wish you luck on your grow and will be keeping a close eye on your progress.
You can never go wrong with adding peat moss, I was able to pick some up for $5 for 3.8 cubic ft I would also consider adding perlite and water absorbing crystals. The main thing is to make sure the soil is loose and not clumped together.
I'm currently growing Texas Timewarp X Blueberry, all i can say is they are touch buggers. Blueberry can get rather dense and the end of flower so mould could potentially be an issue.
East Island Seeds- Purple Skunk X Dutch treat or Northern Lights X Dutch Treat. Can't say much about the others. I've hear the hashplant is acceptable to mold.
Aeration: Introducing oxygen to the water source to convert soluble iron to its insoluble form.
Filtration: Media used to entrap and screen out oxidized particles of iron. Usually requires backwashing to remove accumulated iron.
Water Softener: Removal of soluble iron by ion exchange...
Can't really tell in the picture, but it looks like you have your lights far away from your plant tops. Bring em down if you haven't already to around 3" from the tops.
Transplanting now won't make you plant much larger. Veg time is what mostly determines your final plant size. If you can grab the plant by the bottom of the stem and pull the whole soil mass out of the pot then its rootbound.