Mine are only about a week and a half old so they are still absolutely tiny. I've been thinking about putting some in the 29 gallon but I am not sure that my Gold barbs won't eat them that small. They don't eat my ramshorns though.
I just went and looked, I have some that are absolutely tiny and some that are already the size of a baby aspirin.
Any time, Be happy to put you together a plant package. I clipped some for someone a couple of nights ago and then they canceled so I actually have a tub of clippings sitting here I've been trying to decide whether to sell or plant them somewhere.