When fishing in a small tank, you don't have a lot of room to wander, and it's harder to find new spots in which to fish. Because you're standing in the same area for most of the day, frequently changing your lure is important. Try different types and see what works. You might be surprised to learn that the fish from the same species respond to two or three types of lures.
Stay in One Spot
The most common problem in fishing in a small tank is that you tend to give up if you don't catch any largemouth bass right away. Instead, stay in one spot and fish for longer than you intended. This helps you catch the fish moving through the area and feeding. Just because the fish aren't biting in the morning doesn't mean they won't be biting later in the day.
Fish in the Cover
The best place to find largemouth bass in small tanks and bodies of water are in areas with a lot of cover. The smaller breed of these fish hides and lays in wait in only minimal cover, such as in a patch of grass or a stump in the water. Try fishing in these types of places. Look for anything sticking up over the water or signs that something is growing in the water, and spend part of your day there.
When fishing for largemouth bass, look for the areas of the water where it's most shallow. This type of bass prefers the shallower areas of the water. The lower and upper ends of the water are a good place to start looking. Also consider combining several tips and looking for a shallow part of the water that is overgrown with vegetation for the fish to hide.