My tank is cloudy and fish died. When can I add an Oscar?

Question

hello i have started a 75 gallon tank last Saturday made 4 weeks i have had fish in the tank to help with cycling i had 8 zebra danio but they all have died or been eaten by the others now i have 6 black skirt tetras so i started putting fish in my tank last Friday made 3 weeks and take my water in to be tested maybe 3 times thus far they say my water is ok but i have had some fish die and the water is cloudy i do understand that is normal so when can i add my oscar fish to my tank ? thanks. Pet's info: Fish | Unknown - Fish

Angel Alvarado, LVT · Accepted Answer

If you put an Oscar in with your Tetras, they will be harassed and eventually eaten. Use a home test kit or submit a water sample for testing to check chemistry. Aim for 0 ppm ammonia and nitrites with a nitrate level of 20ppm or less. It can be slightly higher if you have live plants. If there is still ammonia present, the tank is still cycling. The cloudiness may be micro-bubbles which will eventually resolve or it could be a bacterial bloom which will also resolve once the tank has cycled.

My tank is cloudy and fish died. When can I add an Oscar?

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