AlyeskaGirl

I bought mine online for 17.99. I dont know what they run in stores, I've heard $30.00. but it is worth it!!!

Dozey

You really need your own test kit. The LFS tests are often very inaccurate. A quality test kit will be a vital tool at your disposal to assess problems. Even in a cycled tank if fish are acting out of sort and or dying this will be your first line of diagnoses. Fish could die off due to several factors and eliminating toxins as a possibility will be vital to dealing with problems.

Lucy

No problem, I answered in pm.
Good luck, I hope things get straightened out in your tank.

cerianthus

Go online. API Master goes for around $20 which comes w/ pH, ammonia, nitrite and nitrate. (it's been while, dont remember if comes w/ High Range pH too, not that you need). Meanwhile do small 25% water change and cut down on food until kit arrives.

ShaynaB

If you go to Petco or another chain store I've seen them for up to $30. Sometimes I've found them at smaller stores for cheaper.

I'd say do a water change now and just keep watching the new fish. Sometimes it takes a couple days for them to get comfortable especially because you have zebra danios. They're quick little buggers... Your other fish just might not feel 100% comfortable yet.