high nitrite

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...