One thing I would like to make clear about blood parrots: these are hybrids, they cannot reproduce. Their eggs will ALWAYS be infertile!
I have a single blood parrot I keep in a 260 L tank. He has quite a few tank mates, including 3 different types of plecos (lime, butterfly, and common), a crawfish, 2 albino channel cats, 2 dwarf flame gouramis, 4 giant danios, and 4 swordtails. I just want to let everyone know my tank conditions to maybe contribute to figuring BPs out. I keep my water generally at 27°C, pH is about 7.0, and I feed all my fish a combination of algae discs, flake, and tubifex worms. The BP eats a little of each type of food. Although he hasn't damaged any fish I have seen him on occasion ram my plecos. Seemingly for fun. He also likes top dig around in the gravel. I also work for a petshop and we keep BP's in stock. We feed them a combination of flake and blood worms. On occasion we feed them dried shrimp and they seem to like them. I've kept them in displays with tinfoil barbs and they got along exceptionally well. The BP's even schooled with them at points. We keep our water generally at 24°C and pH 7.0-7.5. Just wanted to shed a little more light on the subject.
I purchased a Parrot listed as a "Marble Jelly Bean Parrot". Originally, I did not know it was injected with dye, but it is a beautiful yellow with pruple tints. Aptly named Homer, he is a lively fish with an entertaining personality. He loves people and will put on a show when he knows a meal is coming. A varied diet of frozen shrimp, bloodworms, and vegetables has kept the color and health great. Tank is a 200 L with gouramis, tetras, a single bala shark, and japanese plecos. I have had various freshwater setups for about 15 years, and Homer is the first fish I have enjoyed this much.
I've got two parrots and they are very intelligent fish. When I get the can of flakes out they run to the front of the tank and dance for food. They get along well with each other and their tank mates. They can be so funny when they play hide and seek with each other and like to rub their faces in the dwarf hair grass in my tank. I would warn others that any parrots labeled as "Jelly Bean" Parrots or "Bubble Gum" Parrots have been dyed and will have stunted growth due to the traumatic dying process. I have seen a few acts of aggression but the shape of thier mouths prevent any damage to other fish. My pair are very curious about anything new in the tank. They continually eat the baby snails that can plague a tank. They crush the shells in their throats, which they use to break up food (instead of their mouths).
I have 6 BP's. All are wonderfully different fish. They are all natural colored, 3 bright orange (Red Devil?), 1 yellow-orange (Midas Cichlid?), 2 tiger striped. They all have no problem eating, I feed floating-sinking pellets, tubifex worms, beef heart, a cichlid mix frozen food. This is how I care for mine - first, they prefer long tanks rather than high so they can have plenty of room for caves and shelter. Second, live plants are good, I have had much success with anacharis and amazon swords. I keep the Temp at 26°C, with slight variations acceptable. I keep the pH at 6.0-7.0, but closer to 6.0 is better. I keep the water soft (I have a well, and add almost nothing to it except Stress-Coat after cleaning). These fish do get large (my biggest is 23 cm) and can be quite aggressive, so I recommend keeping fish of a similar size or small, fast fish such as Jelly-Bean Cichlids, and make sure to provide plenty of caves or other hiding places. These really are a fun fish, they will take food from my hand, and let me know when it is time to eat by lining up at the glass and staring out at me until I feed them, then it turns into a feeding frenzy.
I have 3 BP's, 5 green terrors and 1 electric blue in my 270 L tank. I seldom find any cichlid live and fight in group like BP's. Every time the green terrors (10 cm) attack my BP's, my BP's will defend in a group of 3 and the green terrors never hurt any of my BP's. On the other hand, the BP's are peaceful and never fight themselves. They even sleep in a cave together! One of my BP's has no tail (the fish store called it Heart BP and it really looks like a horizontally posed heart!). BP's are hardy due to temperature and water conditions. But the pH should be kept within 6.0-6.5 to keep the color. I highly recommend this beautiful fish.