kotenok
Aquarium Advice Regular
Hi everyone. I am a beginner and I need your advice. Just yesterday I took over my friend's fish tank with 7 fishes. I have emptied it out and saved all the water in buckets, since I heard it is better to use old/native water. My question is did I do right by saving old water? Or it would be better to start with the fresh one? I also have a filter, but it is really dirty inside. Should I change it or it would be better for some time to use the native one?