jeremyblevins
Aquarium Advice Freak
Hello everyone i recently bought a fluval 305 filter and it's been running for 17 days do you all think it's safe to remove my pos hob filter without risk of a cycle?
I would recommend disposing of any filter media, or anything highly porous or with a high surface area, such as aquarium gravel and some decorations. You probably also want to dispose of any plastic that may have become brittle over time. All of these items should be replaced with new, because some of them will no longer be usable, and others may have been exposed to harmful to toxic chemicals that will be difficult or impossible to detect and remove.