German angel fish maintenance

Hello, i have recently bought my first aquarium from a local garden centre were i work, i have never kept fish before and its something i have little experiance in. My question is..... i bought 3 German angel fish for my large tank, the temperature is 26 degrees celsius and i feed them as instructed by the employee at the garden centre. But 2 of the 3 angel fish, which i bought have went from a sivery colourless colour, to a jet black colour along all the fins and most of the body, is this just their natural colours coming out aor is it something in my water. The other angel i have has faint black stripes on its body that seem to be getting stonger by the day, i hope this is ok. If anyone could give me advice on any maintanance and what other fish i should NOT put in the tank and how often to feed ect that would be great! THANKS!!!!

Angelfish are a true "tropical" species so they prefer water around 28 or 29 C (80 to 83 F). Usually, their colors fade when they are moved to a new aquarium and become more brilliant as they start to acclimate. You did not say if the new aquarium has been properly cycled. The cycling process just means that the aquarium grows a colony of bacteria that convert waste materials from ammonia to plant food. If the tank is not cycled, be sure to test for ammonia, which can kill the angelfish. To encourage bacterial growth, use a scoop of gravel from an established aquarium, and add plenty of live plants. If you notice ammonia spikes, change about 20 percent of the water every day for about a week. You can also buy some products, like Echo Complete, that contain beneficial bacteria. Be careful about adding chemicals that are supposed to correct certain water parameters. Angelfish can tolerate a wide range of water conditions, but they cannot tolerate sudden changes.

About feeding. I like to feed a good quality flake food in the morning and frozen (after thawing) mature brine shrimp in the evening. Don't feed the fish any more than they can eat in a few minutes. If the fish act hungry, they're usually healthy. Fish that are not interested in food are stressed.

You also asked about tank mates. As angelfish mature, they become aggressive and are very good predators. Fin nippers and plecos will hurt angelfish, but the angels will eat or intimidate just about anything smaller. In addition, angelfish need warmer water than most other species. People will tell you they have raised all kinds of aquarium fish with angelfish, but the best setup is a one species tank. Each mature angelfish needs about ten gallons (35 or 40 litres) of aquarium space, and spawning pairs need their own aquarium.

Did I say welcome to the forum? WELCOME! Post pictures, ask questions, participate, have fun.

thanks very much that was very helpful

What is a "German angel fish"?
Never heard of it.
Can you please post some pictures?

I would also like to see a picture, because German angelfish is a new variety to me. It's probably just another one of the many variations on the good old silver angelfish theme. Maybe it's popular in Europe, and maybe it's something new from a German aquarist. I thought for a second about German Blue Rams, but the description didn't fit. The main thing, though, is we were able to help Dbennet

ok ill post some pictures tommorow is quite late here in the uk atm so ill do it tommorow! Thanks for the help guys this is a great site