I don't know about blood parrots, but I'm sure Texas and severums get over 1' and need to be in a tank large enough to accommodate their HUGE size, a 70ltr isn't sufficient, nor is a 200ltr, or even a 300ltr. You want something closer to 400ltrs (approx 100 gallons) MINIMUM just to keep ONE of those fish. So, unless you can get your hands on a 6'x2.5'x2' tank, chances are they will not be "happy" in your care.
I'm not trying to sound mean or start an argument, but please, google your fish, look at the sizes they can get too, and get a tank that is AT LEAST twice as wide as the fish's maximum potential size. For a 1' long fish, the tank should be NO LESS than 2' wide.
Google is right there at your fingertips... Use it.