i really think you should go with at least 1 gallon buckets those roots grow crazy and fill out every where, a 16 oz pot is the size of a solo cup and i just dont think that is enuff,but i would like to see the out come if you tried, i love R&D...
there is no solid proof that clone potency degrades over time and anyone that says it does is just so use to smoking that strain that there tollerance to it makes it seem as it is degrading in potency.
clones are exact copies.
what does happen is that it gives time for the genetic weaknesses to rear there ugly heads (prone to root rot, spider mite weaknesses, diesease and fungusus, etc..)when you grow the same strain over and over..but in your case these are probably nothing to worry about, so clone your ass off.hehehehe
i have a friend that has been growing the same white widow clone from clone for years withno problems, every batch is a sugar coated as the next...
hey man your plants are lookin great by the way, and i promise i will never give you bullshit advice that i havent tryed or seen in action, unless i say hey i dont know for shure but i herd blah blah blah.. there are enuff wannabe weed barons on this forum, so i will do my best not to be one of em...
hope this helps greenleaf