I just have a question maybe its stupid but please answer. When they say on a website like a fish needs 100 L Gal i dont know how much in gallon, does it mean if u want to add another u should get a 200 L gal or u can add 2. How can u know how much fish of each type u can add to make ur tank not overstocked.
I'm not quite sure what you're asking about. Hmm, would that answer help anything? Here: Oscars, for example. It's often said that one Oscar needs at least 50 gallons of water. So yes, 2 Oscars would need at least 100 gallons of water.