Is it harder to make a twenty gallon tank work for your fish over a 10?

I've also been told that the larger tank is easier to maintain in terms of the chemical balance that is necessary in a healthy aquarium. I want to get a larger tank at some point, with more plants etc. I believe that it will be a little more work to maintain, but at this point my tank is so little work, that it doesn't bother me much. What type of fish do you keep? I've got mollies at the moment, and they breed non-stop.

I would assume the larger tank, the less dirty the water would get.. unless you are talking about a salt water aquarium? I think there are also different sizes and heat capacities of heaters. Just get a bigger one for a larger tank. I had a 50 gallon tank and only had one heater.

I think the bigger the tank, the less chance things can go wrong and toxins built up. They make different size heaters --ask at the pet store what they would recommend.

It is true that the larger a tank is the easier it is to maintain. Two things that I tell people as to why this is, is One : Which freezes over first in the cold winter? A pond or a lake? And two: If you drop a drop of poison in each a small tank ane a large tank, which fish are going to be affected first? The answer to the first question is the pond because a small body of water changes temp quicker than a larger body of water. And when you change temp of the fish to quick it will stress the fish and lower the risistance to diseases. The answer to the second one is the smaller tank will be more concentrated and will therefor affect the fish faster. Since fish are giving off byproducts that they do not need to live with it will build up faster in a small tank. You should do small but frequent water changes to help take out this pollution. Make sure to add chemicals to get rid of chlorine and chloramine as well as heavy metals when you put water back in the tank.

I agree. If you want a 20, get a 20. This in no way qualifies as a large aquarium. Your water changes will be slightly more in terms of gallons, but you have room for more fish and the tank is more stable because...more water=more stable, generally. A second heater? No. What watt heater do you have already?