#sand

I currently have gravel in my aquarium but really enjoy having catfish in my tank especially Corydoras , some people have mentioned I should change my gravel to sand as it’s better for their whiskers and bellies on the bottom, but I have substrate mixed in with the gravel , is there any easy way...

Hey guys, I am in the process of setting up another tank and I had some questions regarding some items I have found at cheaper prices than pet stores etc.   The issue I am concerned with is that they are not safe or not the same as the other items usually used in their place.   First is the...