I'm planning out a 20 gallon standard and I'm at the point right now of choosing a filter. I plan to have a planted tank with 3 Kuhli Loaches, 2 German Blue Rams and 5 Phantom Tetras. I know it might be a bit overstocked but I thought that if i get a strong enough filter then I'll be fine. I was thinking about a HOB that runs at around 300 GPH. Is that reasonable? Any recommendations? I'm aiming for something $50 below.