so today is day 4 of my 55 gal setup and i had a cichlid in my tank for 2 days then i bought a test kit and everything was pretty pefect my nitrite was 0.25 now i got a pleco yesterday and tested my tank today and nitrite was 5.0 so i did a 25% water change 30-40 min ago and tested the water to see if it made a difference and look at my nitrite...


