Customer jus bought tank it is on her shopping wagon Fish specialist to customer how big is your aquarium: customer 15g specialist: ok here are a list of fish that are suitable for your tank oscars, 100 neons, 6 plecos the list goes on here is the equipment you need sand and decor. Customer what about a filter: fish specialist oh all you don't need a filter or hood because fish will jump above the water to breathe and if you don't over feed there will never be any ammonia nitrite trAtes because nothing decays and your pleco will eat the poop. At that moment I am steaming and want to step in and give this " expert" a piece of my mind but I didn't and the lady walks out with 1 Oscar 1 fancy koi 10 guppes and 20 neons.