- Reaction score
- 1 year
Hello I just recently set up a new 29 gallon tank with an aquaclear 70 to move my Tiger Barbs to. I moved all of their decorations over but left the old substrate out because I switched to eco complete. I cut up their filter cartridge from the old tank and placed it under the new bio media in the aquaclear and my tank instantly cycled with no problems. My question is, will having the same amount of fish with the old filter media prevent new bacteria from growing on the new bio media? I ideally want to remove the old media as it is really old and dirty and takes up a lot of space in my new filter that I would like to use for some new bio media. How long should I wait to remove the old stuff?