I have problems with foamy water I went and bought a 75 gal
took my water filter and fish from the 55 gal
and put in the rest of the water from tap. Everything looks good water is not as good as I've had it before nitrates around 30 and my general hardness is high I don't know how to bring hardness down? Anyway what usually causes what looks foamy what kind of like dish soap I did clean some stuff off withdawn but then ran the hottest water I could over everything my fish all look and act fine but the bubbles are angering me also my water is cristol clear. Fish tank was used but rinsed it out with no chemicals.