ltkenbo
Reefing newb
I setup a 10 gallon quarantine tank last week, bare bottomed, just a couple of pieces of PVC and a fake plant. It's got a sponge filter which was seeded for like 2 weeks in my 55's sump and also just a filter sponge that sits in the corner which seeded for like 2 months. The water in the tank is from my 55 which is mature. Anyways, I added a maroon clown like a week ago and was planning on doing a water change soon and I checked the water parameters tonight and found there was no ammonia however there is about .25 ppm of nitrite. Any concern about this? I mean obviously I need to change the water but I mean why is it doing this when I'm using an established filter with only a single fish?