I am picking up my bigger aquarium soon, all I know is that it's 70cm long, my current tank is 50cm long. It should be 20-30 gallons, an upgrade from my old 15 gallon. I have the 15 gallon stocked with three otocinclus, 2 honey gouramis, 4 neon tetras and 5 sterbai corydoras. My hope is that...