I am sorry for that. You must be from Europe (other than UK)? The reason most people here use US gallons is that a lot of people on Fish Lore are from the US. I understand it may be confusing to you if you're used to Liters. I would probably also be confused if I used a website where everyone talks only in Liters. But hey ... this is why Fish Lore has the Calculator

So that we can all understand each other better
For example, if you hear somwhere that you should have a filter that pumps at least 10 times the volume of your tank per 1 hour, and if you tell me your tank is 110 Liters ... Well, you go to the Calculator and it tells you 110L = almost 30 gallons. But it doesn't matter in that case if it's Liters or Gallons, because 10 x the volume of a tank per hour is just that. In your case, you'd need a filter that pumps 1,100 Liters per hour, while in American gallons it would have to be a filter that pumps 300 gallons per hour.
I hope this helps you somewhat
