umm in all my cubes i took out the stock media, run rock rubble, i used a coarse black sponge in the second chamber cut to fit the opening perfect, over rubble, also you can run chemi pure in first chamber just bought a seperate bag and divided it up, so one thing of chemi would last a while, i had bad heat issues so i never ran a heater but it might help to keep them from dropping at night. Fans also got noisey so i replaced mine also cut vents in front door and back for more airflow. i think thats it lol. water changes once a week 10-25% is good

chris(former biocube king)