Aquarium Banana Plant: 
Care, Tubers, Roots & PlantingCaring for an aquarium banana plant (Nymphoides aquatica) is easy: plant the tuber directly on substrate (don't bury), provide moderate light (more light equals bigger leaves) and tropical temps (68-82°F), use root tabs or liquid fertilizer, and avoid CO₂ if possible. Prune dying leaves and watch for snails that might eat them, but otherwise, this hardy plant thrives with minimal fuss, sending up lily-pad leaves to the surface