Join Date: Nov 2018
Location: Northwest Arkansas, USA
High ammonia problem
I have a 90 gallon fresh water tank, moderately planted and moderately stocked with fish. Eheim canister filter, full back wall air bubbler and now a standard DIY CO2 generator setup. It's been up about 2 months. Everything was fine until we had a meltdown that we believe was caused by a faulty CO2 generator. Caused milky water and released some black, oily residue into the water. Lost some cardinal tetras but nothing else. After major cleaning we got the water cleared up beautifully. We've probably done enough water changes over the last week or so to completely change the water at least twice, so any additives we used to help save the fish should be gone. We have added Start Up to help reestablish the bacteria in the tank. Our problem is a terribly high ammonia level every time we test. Using the API master test kit and getting 4ppm results. NONE of our fish, snails or shrimp are showing signs of distress however so I'm stumped on what's causing the high ammonia and how to fix it. Nitrite and nitrate levels are back to 0.
Thanks for any ideas.