pumpkinsmum
Aquarium Advice Newbie
Hi, so I have a 6 month old ranchu in a 10 gal tank, I've had him for around 3 months and I've noticed the filter sponge is getting dirty super quick. I do around a 20% water change every week or so, and every time the filter sponge is really dirty with what looks to be either fish food, fish poop or both. This week I only left it around 4 days before doing a 10% change and again the filter sponge was super dirty. It's a filter for a 10 gal tank so do you think maybe I need a bigger filter? Or am I overfeeding? I feed sinking pellets twice a day. Have attached a picture of the tank and of what I washed out the filter sponge 4 days after last cleaning.