Hey bro the only intelligent answer i have for u on this subject is. When ur growing different strains in the same res.. Be sure to pick strains with the same finish time.
And once u do that then make sure the flower hieghts are also the same beacause the taller flowering plants or strains will beat out the smaller strains before u harvest.
Keep everything consistent and uniform..
This should be ur main objective even before u purchase ur beans and applied to building ur tub as well.
Make sure they all have there own net pot and evenly distrubute ur pots over the surface area of ur tub..
Yes i have grown 3 strains in one tub and made a mistake of mixing a sativa dominant strain with 2 indica dominant strains.. wasnt a complete failure but i learned alot from that grow.. The indica finished about 28 inches... The sativa finished about 5 foot tall..
Not a great way to grow plants as they all need the same respect from the start and equal lamp/cubic foot to make all this work.
Hope that helps.