Sure, I don't see why not. But do watch out for a few things:
1. I hope you have a bigger tank for silver sharks, seeing that they get a foot long and depending on how many you have need a 120 gallon tank eventually.
2. Black widows usually don't get along with angels unless you have a big school with them because they are fin nippers.
3. IMO clown loaches can fit in there. So can rainbows.
4. No BGK. Same as the sharks, needs 120 gallons because it gets 16 inches long.
Also just about AqAdvisor.
Many people have differing views about that but the majority of people don't think it's very accurate. I concur. It's a good tool for very rought ballpark estimates or simply playing around with it but nothing as a general guideline. Just my opinion on that