rich311k
Aquarium Advice Addict
You really need to get that nitrite number way down. A 50% change should make it 2.5 which is still way to high. You really need to change say 75% of the water, wait an hour or two and then do it again. You want to that the nitrites under 1, preferably close to .5. Angels are very sensitive to poor water conditions. If you have not left for work yet add a double dose of Prime to help deal with the toxicity of the nitrites until you return home.