▲ 1 r/bioactive
How thick should aquarium filter be for drainage layer?
I'm using a 20 PPE filter sponge as my drainage layer for my 18x18 bioactive - for folks that have used this method. How deep of a filter do you use?
u/Frostknife — 6 hours ago
I'm using a 20 PPE filter sponge as my drainage layer for my 18x18 bioactive - for folks that have used this method. How deep of a filter do you use?