well i can help ... i was going to run the second filter in this tank and use some substrate from this tank in the other ... it may not be perfect but it should be much easier on myself and the future inhabitants
40 gallon - Misc fish
15 gallon - Axolotl
5 gallon - Betta and ADF
20 long - Hatchling turtles and corydoras.
Soon to change I am sure