Corals are a good bet. You can easily get too many fish, and you'll reach max fast. Overstocking a tank with corals? You can fill it, grow them, wall to wall. Trim them. Trade the bits. Fish can live in and out among them very happily. And they are living filters...granted you have the right lighting to support their photosynthesis: they're a critter that makes a living off light and water and fish poo.
If you're a compulsive lfs shopper---corals are a much better bet in the long haul.
If you're a compulsive lfs shopper---corals are a much better bet in the long haul.