Zjovana
Aquarium Advice Apprentice
When I first purchased my tank a few weeks ago, I bought some extra filter cartridges because it said to replace them every 2-4 weeks. But people on this forum have said not to replace the cartridge at all. Is this true? Will I eventually need to replace it or do I just keep rinsing it off when needed? Also, I read that the good bacteria is on the gravel, decorations, in the filter, etc. So does that mean I am not supposed to clean the decorations? Any advice will be greatly appreciated! I'm very new to fish keeping.