08-22-2011, 11:28 PM
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As barb indicated you need to find out your parameters first of all.
On to other reasons why your ghost shrimp will likely all be dead shortly. There are several species of ghost shrimp, most of them are brackish. This means you have to have a small amount of marine salt in the tank. Also Danios are curious fish. Unfortuantly a curious nip from a danio will probably kill a ghost shrimp.
The size of the tank is fine for the shrimp, however Zebra Danio are fairly active fish and should be in a 20g+.
If you would like to have shrimp I would recommend looking into Red Cherry Shrimp, aka RCS. Again though putting them with danios will probably just mean more dead shrimp.