The albino cora seems like he's on crack though...swiming all over the place...is this normal?
yeah. albino cories always act like they're on crack.
If you plan to do a fishy cycle, 2 zebra danios and 1 cory aren't going to produce a lot of waste. it might take a while.personally, I'd reccomend doing a fishless cycle. As you might have inferred, this involves bagging the fish up again and taking them back to the store.
Then, you need to get some clear ammonia. For details on how to pick the right kind of ammonia, ready the "Cycle" sticky at the top of the freshwater newbie forum. Once you have the ammonia, add it little by little to your aquarium until your ammonia test kit reads between 3 and 5 ppm. Next, get either some filter media (preferably a filter sponge) from an
already established tank, or go to your local fish store and ask them if you could have some "gunk" from their filters to cycle your tank with.
Whichever you get, add it to your filter and run the filter on the tank. in 24 hours, check the ammonia level again and if needed, add enough to raise it back up to 3-5 ppm. repeat this every 24 hours. soon, the nitrITES will rise. kepp an eye on them with a nitrite test kit. when the nitrites drop, tada your tank is cycled. then, do a BIG water change to get rid of all the nitrATES, and then you can add fish right away.
Before you add fish, though, to double check that your tank is cycled, do this: Add enough ammonia to bring the level to 3-5 ppm. 24 hours later, there should be no measurable ammonia or nitrITES.
Hope that helps.
