I think Old luck has already decided not to use the dry ice anymore.
Yea I'm really seeing what your talking about Oldluck, those nugs do look small
Its hard to see such small nugs when you look around and all the other plants at this stage have much larger buds
At this point I think its safe to say you can't expect a huge harvest off those plants, but the buds that are there will get bigger still. The question is why are the buds small?
How much light are you using? maybe they needed more light? how much air are they getting? maybe they werent getting enough CO2 to thrive. Maybe nutrients were the reason for this, less N and more PK surely would have helped
Hopefully you will know how to better the next grow so that you have plants covered with bud
I think the most obvious reason that the plants have a small amount of bud is that there are not enough budsites, the internodes stretched too far, which to me indicates low lighting. If you had 4 times as many nodes you would likely have almost 4 times as much bud on the plants, but keeping the internodes short is a difficult task, and requires alot of light.
I don't think those are Sativas, so I think you'll be harvesting in 3 weeks, judging by the reddening hairs.
Your still going to get a good pile of weed at the end though, so don't be too sad