hey you guys i want to have my bowfront completly sponge filtered only because when my Red Tiger Motaguense breed alot of fry die by getting sucked up into my Emperor 400 which i hate , so how many sponge filters would i need to power my tank i was thinking 3 of them and what kind should i use i currently use 1 sponge in it but idk the brand, does it matter the brand of sponge filter because i can get the azoo sponges here, and elite double sponge, or should i just buy hydors, and are the sponges that stick to the wall good? also i have a 30g medical tank , sometimes there is 3 6" fish in there at a time getting healed how many sponges should i run in there thanks u and here a pic of my 72g and 2 of the sponge filters i was talking about im pretty sure u know the rest, also sorry for the old pic of my 72g but my 30g looks the same and in my 30 g i divided one side with egg crate should i put one sponge on each side?











