Hi I have a 75 gal tank not a lot of stock in it right now but need to switch to a sump. I am currently running a canister and want to add more fish and the sump would be better. Tank has been running for over 2 years. First is what do I need to run a sump what does it all contain? I don’t know much about it all about them. Do I buy a kit with baffles and then add the equipment need.