Window tank finished cycling this morning. I don't know why it always makes me so giddy-happy to see the pale blue in that little test tube. It's ready! So this morning I did a big water change- probably 90%- siphoned out down to an inch above the substrate. Not because of sky-high nitrates, they were only about 50ppm, but because I wanted to get out all that disgusting fuzzy white mold from the food remains.