what should i do with my old gravel and filter?
so recently i upgraded from a 15G to a 55G i have new gravel (flourite) and a canister filter now in my new setup. i have 2 media bags inside my tank right now with some old gravel and also running my old filter HOB(marineland penguin 150b with bio-wheel) to help jump start my cycle. my cycle is pretty much done, but im giving it another week to be safe, once i start adding fish i will be removing the media bags and the HOB filter.
-keeping the small tank as a QT tank is not an option. no space.
-i have an acrylic tank now, i was thinking about just leaving my old filter on top but it just doesn't sit right on the tank and i dont like the way it splashes too much. dont like the sound of running water. i know 2 filters is better then one but if anything ill get another canister in a few months.
-first priority is to sell the whole setup, but just in case i keep it. here is my concerns:
1.how should i clean the gravel in order for me to store it so that it doesnt mold or stink? (regular black substrate)
2.should i keep the bio-wheel for my old filter? or just throw it out and buy a new one later just in case i set that tank back up in the future (years) lol
will the bacteria just die off?