Fluval Spec V 5g

Fluval Spec V is built to a noticeably higher standard than most kits at this size. The aluminum trim, thick glass, and powerful circulation pump make it feel like a product that will last years rather than months. The 37-LED light is strong enough to grow a wide range of low-to-medium light plants, making it the best choice for a planted betta tank. At $140 it's the most expensive option here and nearly double the cost of the Marineland Portrait — worth it for buyers who want to grow into the hobby rather than replace equipment.