130 Gallon High Tech Under Construction
That's what I thought. You see them so often in planted soft water tanks. I just didn't take a stand on it because I was finding varying info online and didn't know for sure.Actually, it is the opposite, Congos prefer an acidic environment to an alkaline one. But, they do well in a wide range. I have mine ( I have 4 different types of "congo tetras") in GH of 6. All do great.