Hii. Im patrick. I'm a college student and i recently got my baby arowana(silver arowana) which is my favorite fish since i was a kid. But now I'm confused of putting up a sump filter though i really don't know how to build one but i thoroughly research on the internet and i have found the best filter is a sump filter for my 32gal tank i have found a design from youtube that uses a trickle filter and moving bed k1 biological filter i really dont know how many kilo of k1 i really need and another pump for the out take to the tank aquarium. Plsss help. Asap. Im going to build my sump filter 2x1x1(by feet). On sunday. I dont really have that much money too cause we are poor asf. Ryt now. Im worried about the ammonia, nitrite,and nitrate lvls of my tank plsss help asap.