Hello there! I'm a newbie here. I experienced setting up an aquarium before but that was a long time ago. I tried a Gold fish, molly and a sword tail before. Are these 3 okay to be in the same aquarium? What other fishes can I start aside from these 3? I stopped before since I also don't have enough time to maintain it. How often do you usually clean the aquarium? Do you have any tips if I start again? Like the maintenance, how much fish I can start and kinds of fishes that can be put in the same aquarium.