I signed up a few days ago and wish I'd done so much earlier! I'm also new to this goldfish caper but I love my fish mates and want what's best for them, so if someone can help with my question, I would appreciate it.
I have a sick fish in a 40 litre container and have made a temporary filter system, but I'm not entirely happy with it. What type of small, internal filter would people recommend? Or, has anyone constructed one? Cheers,