adding more angels to a 46g tank

Question
Hi
My 46g tank have a bunch of live plants and it also have a fluval 405 and whisper 60 as filter and temp set at 78. i currently have two angels about 3 in each along with two boesmani rainbow and one butterfly pleco (stay bellow 5 in). I want to add one more angel to the tank. Is that okay? Is the new angel going to cause a problem with my old angel? another question. One of my currently own angel doesn't seem to be interested in eating flakes and freezedried shrimp. about one week ago i have to put both angels in my 10 gallon tank for a about four or five days because i need to add some nutrients for the plants. but after i put the angel back into the 46 gallon tank, the slitly smaller angel and rainbows still eat like normal but my larger angel only eat one flake each time i feed him. He just stare at the food floating at the surface and swim down to the Amazon Sword. it he just stress out or its their some thing wrong with him?
Thank you

Answer
Hi Quan

You can add more Angels to the tank. Angels will either accept or reject new Angels being added to the tank. But if you don't have a breeding pair, then new Angels are usually accepted by the group. Angels should be kept in odd groups of 3, 5, 7 etc. There should be one adult Angel per 5 gallons of water.

As for your second question, you shouldn't have to remove your fish from the tank to feed the plants. Most all live plant fertilizer is safe for fish. Make sure you read the directions carefully and don't add too much plant food to the tank at once.

It is likely the stress of being moved from one tank to another then back again that is causing this behavior with your Angel. Angel's are easily stressed and don't like being moved around. Once he settles down and feels safe again, he should be fine.

I hope this helps, good luck!

Richard