Currently using a 42 gallon tank housing 8 fishes and they are soon to out grow then tank. I want to upgrade to a larger tank around 280 gallons. I have 1silver aro 1rtg aro 2 motoro stingrays 2oscars 1bichir and 1 alligator gar and planning to buy a blue base aro or a chili red aro, what is the ideal tank size required to house all the fishes. and what filtration would you guys suggest for a 280 gallon tank to keep the water crystal clear water.