In terms of water conditions, the dwarf gourami is a fairly hardy species. In the wild, these fish prefer sluggish bodies of water (like ponds, swamps, and ditches) with heavy vegetation. In the home aquarium, dwarf gouramis prefer low water flow and heavy planting.

What is the hardiest fish for an aquarium?

1. Zebra danio. Zebra danios, Danio rerio, are just about the hardiest tropical fish you'll ever keep. They don't mind if the water is hard or soft, still or flowing, warm or unheated, and they are the single best fish for new fishkeepers and new aquariums.

How many gouramis fish should be kept together?

At least four dwarf gouramis should be kept together. Dwarf gouramis are social creatures, and they feel more secure living in groups – the bigger the group, the better. With that said, if you have limited space, you can keep them in pairs.