Thanks styxx. To be honest, it ended up being too much of a hassle to clean them every week. And I could never really get them that clean so I stopped altogether. The otos and amanos do a decent enough job with it. I also drop Excel on the rocks at each water 50% water change. Let it sit for 5-10 min in open air. Got that tip from Frank Wazeter's threads.
OH wow does that really work, and if so how well!? Are we talking no scrubbing!? lol