Just a few suggestions to think about:

• Why do you use this kind of pots?

Cannabis is (as I know) a deep rooting plant (the roots grow up to 1.5m deep in the ground) and with that in mind I would think that they would need a totally different type of plant pot...

• How many arms do your plants have?

I would think that the (for sale) usable yield would be better (bigger buds) if the plants have (dependent from the available amount of daylight in your area) only 6 (winter) or 8 (summer) arms. Your plants are looking a little bit too bushy to me meaning that they produce a lot of leaves but very small and less usable buds at the end. In the past I used some cutting technics in the beginning of the plant growth to get 6 or 8 arms full of buds instead of supporting the plant to waste their power in producing too much worthless leaves by doing nothing about it.

If you're satisfied with your yield then please don't care about what I'm writing here but if you aren't then it would be a good idea to think about what I'm suggesting... ;-)

Kind regards