So i currently have a 30 gallon with a 4 inch tiger oscar, 2 senegal bichir about 5 inches, and a 7" pleco. i just got a 75 gallon tank to move those guys into, plus adding a few more fish. What kind/brand and size filtration should i use, would prefer to get away from the HOB filters. Also probably wrong section but what kind of heater do you guys suggest i use, the stealth ones?