Depends on what you want to keep. One power head would work if you want to stay basic with zoa and softies. Also depends on how much you want to spend. Also, hob
filters only add particle filtration. Which means they keep the water clear. Lr
is a good filter. If you had 2 ph, you would be fine. Or even one. Or a vortech. Or a wave maker. But what do you want to keep? What lights do you have?