I just picked up a pound of chaeto from ORA. If they used Algae Barns method for measure they would have to call it five pounds. Sidebar, I've made two very expensive and disappointing purchases from Algae barn. They grossly overestimate the size of their chaeto balls. Back to the topic, I was pleasantly surprised by the massive amount of chaeto I got from ORA listed as one pound. I was expecting a third of what I actually got. I dropped it into my Algae Reactor which made it 80% full. That made me wonder, is the primary nutrient uptake vehicle of the chaeto from growth or is there a decent amount of uptake from normal photosynthesis tied to sustaining the chaeto? So, if it runs out of space to grow, will it still take up nutrients? I plan on harvesting a 1/3 of the chaeto at a time but I was just wondering.