You mean caulerpa? Ulva is the lettuce looking one...
One advantage of chaeto in a box is that you can always take out to trim and then put back in your tank. Minimizes mess floating in tank
Yes, Caulerpa is the sexual one I was referring to. And yea, Ulva was the lettuce type. Is that good at nutrient export, or not really?
Chaeto in a box is good for pods, but won't maximize water contact. My sump is custom, because it's a 93 cube tank currently, and doesn't have baffles before the return pump. It just has a 10 inch high wall that the water flows over into the return chamber. So the compartment before the return chamber had about a 16" x 10" section with a small powerhead to rotate the chaeto and I had the chaeto ball loose, just tumbling around. Every time I trimmed it there would be little pieces that flew everywhere, including the return chamber.
I actually use rock rubble, by CaribSea, in the plastic containers that it comes in with holes drilled. Trying to create a more anaerobic area for denitrifying bacteria. Because the container doesn't allow good water flow unless you make swiss cheese out of it. That's why, for my purposes, chaeto in the container wouldn't do enough to export nutrients as opposed to it being allowed its freedom, but used as a pod refuge is great if kept in your DT.
That's why I wanted to see if I could just drop that Ulva in there and have it go to work. But I think it's a slow exporter.