sump? need help to make!

[tanksrus]

i have a 75 gal salt tank and I want to put an sump filter system on it and take off my back packs....can some one educate me....where...what to buy?

 

[sou812]

I used this one on a 90 works great $50 it is a 4 tray trikel filter on a 20 long. all u need is media and a pump.