How deep should my substrate be?
I set up a 20 long and it was recommended that I use 3 bags of eco-complete. from the research i did this was supposed to give me about 3", but it's actually more like 4".
since the 20L is only 12" deep that extra inch is taking up a lot of space in the tank. do i need 4" or can i remove some to make it about 3"?