sponge filters

[Dragisha]

I am getting ready to setup a 75 gallon tank (48").  The main fish that I will have are Xiphophorus Montezumae and  then some supportive algae eaters, like catfish, shrimp, and snails.  I am planning on going with the Co-op coarse sponge filter.  Can someone give me some input on how many I should get?  I am planning on at least two.  Also, if I put in the "never clog airstones", do I need to put anything else in the tank to create current or motion in the water?  Lastly, what air pumps should I get to power the filters?

Thank you in advance!

[H.K.Luterman]

Two would be more than enough, I would think. I have 3 stacked the corner of my 75, because I keep messy eaters and big poopers (3 senegal bichirs). Also there's a ctenopoma in there. Probably over kill, but that's just how I roll. I barely notice them all tucked away in the corner. 

And no one wanted to be in the photo. Looks like a big empty tank. X3

Edit: I use an Eheim 400 air pump.

Edited February 11, 2021 by H.K.Luterman

[Dragisha]

Are the filters you have mediums?

[H.K.Luterman]

2 minutes ago, Dragisha said:

Are the filters you have mediums?

They're the larges. I think two larges would do fine for you. 

[Dragisha]

Thank you!