Just a little update, the pair have spawned several times since my original post, and every time the eggs have disappeared over night. Last night they laid again, but this time have been guarding them better and nearly 24 hours later they're still there!! Not sure what would happen if they hatch, its not really a good environment for raising fry with a school of fat loaches and a big bichir. I guess I'll just have to hope they can defend some of the fry...
Anyone know how long uaru eggs usually take to hatch?