Please kindly provide info about Unknown Chemical, what does it for?
How can I install some new items to decorate my tanks?
How can I play this game in my PC, I saw the window screen shots, its really beautiful.

Sorry for so many questions.

Thx

The unknown chemical mutates fish. Drop it into a tank full of adult fish, and you will see some of them change.

You need to purchase ornaments for your selling tank from the supply shop. You can also purchase special plants for your tanks from the supply shop that will provide certain benefits for your fish.

The Windows version of Fish Tycoon is not yet available. LDW will make an announcement when it's released.

Also keep in mind that for many of the items mentioned above, you need the registered version in order to be able to purchase them. The trial version has a limited number of items you can actually purchase for use in your tanks without buying a registration key.