Nitrite over 10 Why???

[Djhgksga]

I am very confused now. My 20 Gal high in now about 7 too 8 weeks going now. I went thru the high Ammonia part about 4 weeks ago and now for the 2 1/2 weeks I have very high Nitrite reading (well over 10) lost 2 Silver Tip Sharks. I am using strips for reading and verified that the strips are good by reading my other tank 10 Gal which is perfect.

I have 3 large plants in there with the hope that would help, I also have some filter media that is said to remove Nitrites and Nitrates along with the stock filter that comes with Bio-Wheel.

I have also done water changes last weekend 25 on sat and sun morning then another 50% Sunday night.

I forgot to mention that before all this the water was really cloudy. This was before I had test strips but had been testing the Ammonia which was ready 0. The water is clear now after all the water changing.

 

[KcMopar]

You are still cycling, keep up the water changes to keep the nitrites in check and get the drop type test kit as they are much more precise. Once you are done cycling you will see nitrates. This process can last several more weeks.

 

[OrangeCones]

lost 2 Silver Tip Sharks

Is this a freshwater or brackish tank? Carcharhinus albimarginatus (aka Silver Tip Sharks) are not freshwater. What are the fish being kept (kind and numbers)?

I have 3 large plants in there with the hope that would help

What plants do you have? Sadly, a lot of aquarium stores sell plants that are not aquatic, which only adds to the waste being produced in a tank as they rot over time.

I also have some filter media that is said to remove Nitrites and Nitrates

What media is this?