I am starting the set up of a 150 tommorow. It will house two festae red terrors. For substrate I am thinking 50 lbs of pool sand from Home Depot and 125 lbs of river pea gravel from a local stone supply wherehouse ($3.75 for 75 lbs
). Does this sound good? Any other suggestion? That pea gravel is rather large but I figured the fish will get big enough to deal with it.