itsgracia
Aquarium Advice Addict
Ok so I have had my tank for almost 6 weeks now and was cycling for 5 weeks until it's complete. I have 6 Zebra Dainos. I use an Aqua Tech 20/40 hang on filter on a 29 gal. Now my question is I always read about not changing your cartridge and just rinsing it. Don't you have to change the cartridge every four weeks? Does this rule apply to mines or do I follow the box instructions? Sorry for so many questions but I want to do things right this time because the last time around (about 3 years ago) I did everything wrong that you can possibly imagine. Thanks in advance.