high nitrite

Hey everyone — I’m looking for some guidance or opinions on what may have caused the sudden loss of my cardinalfish in my 20g reef tank. This was my first fish loss, and I’m trying to learn from it so it doesn’t happen again. Tank Overview (Pre-Incident Setup): 20g saltwater tank, running for...

My tank parameters are awesome, except my nitrites are 130. What do I do? I did a water change 2 days in a row. Got it to 60. Then today, doubled. I haven't been feeding much. Kept the light off all day. Suggestions?

I have a single Molly and a neon tetra living in my 10 gallon tank. One Molly died and my other 5 tetras died. I have test strips and nitrite and nitrate are high. The kit says to do a water change so did 30% one but there's no change. I would buy more neons but I don't want to risk anymore...

I have 3 mixed reef tanks with fish. 2 75 gallon and a 120 gallon. Tanks have been up and running between 1 and 3 years. The standard readings on my Apex Trident are all within range--Alk 9.52, Ca 514, Mg 1335, ORP 422, pH 8.02, Salt 35.8 and temp at 78. I ordered the Hannah Checker Nitrite ULR...

Hey all. I have a biocube 32. Currently on day 15 of the Dr. Tim fishless cycle. My current readings are: PH 7.8 (and dropping) ammonia .25 (and dropping ) Nitrite at LEAST 5.0. That’s the highest the test kit will read and Nitrate also as high as the test will read at 160. should I do a water...

Hi everyone- I'm fairly new to the hobby and have had an Evo 13.5 for about 9-10months and decided it was time for an upgrade. My new tank is a Waterbox 50.3 AIO and I started the fishless cycle about 4 weeks ago (CaribSea Dry Sand & LifeRock). I went the route of Dr. Tim's One and Only...

I just finished cycling my rock in a trash can. It's been about 3 weeks since I started. The nitrites were sitting at 5 ppm and my Nitrates were at about 20 ppm. I've been doing 25% water changes trying to reduce those. However, each time it still says 5 ppm and 20 ppm for each. If the nitrite...