I cleaned this filter tonight and after rinsing each basket with ro/di water, dumping and refilling the water in the filter, rinsing the white pad, and cleaning the sponge, i reassembled the filter and plugged it back in. I immediately had a rush of white stringy material flood my tank. Any idea what this is, and what area did i miss when I was cleaning? This happened once before and I thought it was because I didn't rinse the baskets. It had no ill effect on the fish, but i still think i must be missing something when I'm cleaning.