I am builidng a tank with bluegill and pumpkin seed so im in a simmilar situation. three bass with a 200G isnt very stocked. Average adult size is 15", and cuz they are messy fish, the theorey of inches rule says they should get 2 gallons per adult inch. Thats 30 Gallons per fish. so your only half stocked. However i wouldnt go much more than that just cuz they are big fish. You want a filtration system that can turn over 10 times your aquariuam volume per hour wiht messy fish. Then do about 50% water change every week. If you are building your own canister filter you want to have about 2 cu. inches of biomedia per gallon of aquarium. Thats about 22 Gallons of Bio Media if you make a wet/dry or canister filter by hand. (0.114 Gallons of biomedia is aprox. 2 cubic inches) THe pump that you will need needs to push 10 times the water in the aquarium per hour. So you will need a pump that pushes 2,000 Gallons an hour (Or you can get two 1,000 Gallons. That will be easier to find.) If you meet all those peramaters, make sure your filtration is running smoothly quite often, then your tank should run just fine.
