The hardest decisions i have personally had with this hobby so far has been how far do i want to go? This is a sort of trial after all, maybe i wont like it or maybe ill continue to have this passion so i have tried to set myself up not to go too deep. But also have enough wiggle room to play and experiment. Originally for an squarium i almost went with a nuvo 10, then after reading and thinking how limited i would be i jumped up to a Nuvo 20. Not a huge difference but i also tried to do the same thing with lighting, tried to get something fairly cheap that i could use on both smaller and larger giving me coral experience depending how deep i want to go. I do appreciate all tips and advice as i know it will either help me now or later down the road