hi all I am planning on upgrading my 55 to a 140 this week and I was going to by all new sand but thought maybe I can reuse my 70lbs of existing sand. The tank is about one year old and the sand is about 2" deep. For a 2" deep sand bed in my new tank I would need about 90lbs so can I use the existing 70lbs and add 20lbs of new. Will doing this cause issues like a cycle or worse?
Thanks in advance
Thanks in advance