Oh good! I am glad you thought it was useful! I'll admit I was a bit confused by your last post and wanted to ask why you thought the OP hadn't been addressed, but after much rewording I couldn't find a way to do so where I felt like it wouldn't sound accusatory. So I went for the short "but I swear I did!" approach.I had missed your link. That is most useful. I am not keeping the kinds of bioloads the author is, and if those were the results, then the additional filtration in my tanks is more a question of moving the water than filtering. That is very good to know.