10-18-2020, 04:04 PM
Join Date: Apr 2006
| | Re: The 5 Month Update
You have this tank fairly well balanced if you've gone for 4 months without a water change. If DOC (from soil and driftwood) is causing bacterial growth in the water, those bacteria are also generating CO2 for the plants. Apparently, bacterial growth in the tank is not so great as to deprive fish of oxygen, but it is enough to fuel plant growth with CO2. By fueling plant growth, plants produce more oxygen. That stimulates bacterial growth, more CO2, more plant growth and it goes round and round.
As long as plants are growing well and fish are not oxygen deprived, I'm not sure I would do anything. A water change or a UV sterilizer, maybe, but you could just sit back and enjoy what you've got.