it could slow down flow rate, but other than that I can't think of a way that it could be harmful
Sent from my SCH-M828C using MonsterAquariaNetwork App
It's almost impossible to have too much media but with a higher bioload the more biological filtration you should have. A tank can do with out mechanical and chemical filtration but not biological.
Sent from my SGH-T989 using MonsterAquariaNetwork App
that is an amazing idea for a sump ! Those bins are super cheap ! lol