marina
Aquarium Advice Regular
February 10th will be the 4th week of starting my 1st tank. Is it time to CHANGE the filter cartridge ? or should I just "rinse it" (my reason behind it is not to loose the "good bacteria", although now that I am thinking, I remember reading that this bacteria is in the gravel and decor (right?). I have a 10 gal with 3 fish in it. Thank you in advance!