Silver Dollar Pregnant

Question
I have a question. I have not been able to find ANY information about this anywhere on the net, or by calling pet stores here in Canada, and the US too.   I have a 90 gallon tank. My fish are Parrots, Severum (15 years old) ID's, Bala's, Columbian sharks, and silver dollars.  Just over a week ago, we noticed that our one silver dollar had quite the belly on her.  Over the past week, its gotten bigger and seems to have changed its shape and is now closer to her 'back end'.  Just so that you know, our levels in our tank are all 100%.  We take very good care of it, water changes every month, etc.  Anyways, I went and bought a tank separater and put her by herself.  Then, since I didnt know if a male had to be with her, I put in a male.  Yesterday she was beating the crap out of him, so I took him out.  Today, she is just sitting at the bottom, and watching all the other fish.  I dont know 'what' to do with her.  Does she need a male to fertilise her eggs????  We also did up the temp in the tank to 80-82 as I read this was necessary.   I dont know how long she will be like this,  or if and what we need to do??? Please help!! I have exhausted any searches now since nobody seems to know much about their breeding.  Now I found your site... so I'm keeping my fingers crossed.  Also, just so that you know, the lights are being kept off, and I also have a towel over her end of the tank to keep it a bit darker for her.  Thanks so much!!!

Answer
Hello Brenda,  If you still have time you can try this. Since you already have a 90 you must have a 10 or 15 around. Divide the small tank with a see-through divider. Put the female in one side and the male in the other. Keep them that way for 7-10 days then remove the divider. That method works extremely well for Tiger Barbs and I've used it for Dempseys. They need a very soft water at 8 dgH and a temp of 82. They prefer a dark gravel and dim light. About 2000 eggs will be dropped in the substrate. And yes you need a male to fertilize them. Be sure you have a male because if its another female she may try (as she was) to kill it). A true breeding pair of Silver dollars is just as much a gift as a pair of breeding Angelfish. Hold on to them if you accomplish it. Good Luck.
   i love you fish selection. Gold severums are a favorite of mine. Along with Red Tilapia, Dempseys, Leporinus and of course Angelfish. Must have Angels.

Wayne