In the next version I would like to have the ability to have 3 tanks plus the Sales Tank. Right now I use the Sales Tank as my breeding/nursery tank. By the time you're working on Magic Fish 5, 6 or 7 you're running out of room because you don't know what to get rid of because you don't know what exactly produces what except for what you have. I used the spreadsheets the first time and It quickly got boring so I started over without them.

Another suggestion I have is when you are selling the fish, you can see the number of fish you have left to sell but you can't see which ones they are. I think that information should be displayed whether in a list or by clicking on the tanks in the store.