I do want to mention that I am not totally devoid of filtration means. I have for years used Chemipure in a Fluval. I don't know if it does wonders as claimed. However, I have never had a problem with tank crashes etc., therefore I will continue using it even when later in the year I am forced to go FOWLR. And as a note to Brad, I have a few bits of SPS corals. Notably a smallish colony of Blue Tipped Staghorn that does great.
