You know, everyone has different experiences...I have a discus cone given to me by a breeder that thought that they didn't work for him & his discus. He thought the newly hatched fry that fell to the curved cone edge were too hard for the adults to pick up, so they gave up. Then there's the whole hole in the top versus no hole issue...crud catcher or aeration area? Good luck, it seem like you are taking very good care of them & adapting on the fly. Keep up the pics too, please.