ILGM Blue Dream Fem manifold

Did my first topping and defoliation almost immediately after posting last week. #3 & #4 are beasts compared to #1 & #2. Fresh Fox Farm Ocean Forest > Used+Mushroom compost(MC). Ph runoff from the fresh Ocean Forest is 6.5, while the runoff from the UsedFFOF+MC is 6.0 The runoff from the MC Soil left a nasty residue in the bottom of my tent and noticed it was a bit darker and not reflecting as much light so I cleaned it up and replaced my Tupperware with a bit more proper plant tray. I used a basket I found in a dumpster, cut the sides off and they fit together perfectly to create a free 2x2 grated plant tray! A week after my first topping #3&4 had 4 nodes on each top so I topped them and defoliated the second node leaving nodes 1 & 3 on each main stem leaving a total of 8 colas. They are flourishing in the Fox Farm Ocean Forest and these Mars Hydro lights are actually doing really well for these girls at 18 inches. I have also been using HST training on #3&4 by pinching the stems just below the nodes where it is still soft, you may be able to see in the pics they are giving them nice thick woody branches. I will wait another week to see how #1&2 hold up I might scrap them and put #3&4 in their own tents depending on how big they get. they are in 2.5 gal now.Any suggestions on moving to a bigger pot?