Tank is a 125g that contains: two discus, eight cardinal tetras, six Corydoras julii, four Nanochromis transvestitus, and an SAE. Decor includes LOTS of driftwood, with some anubias and java fern (relatively low lighting is provided by two 30W bulbs). I am not worried so much about the waste levels (water changes 40% 2x per week) as I am about sensitivity to higher temperatures (for example, the N. transvestitus don't do well at all above 82F). If Royal Plecos, Mango/magnum plecos, and Gold Nugget Plecos will all do OK in this water, I have spares in other tanks that will appreciate the extra room. But since I maintain most tanks at 78F or lower, I didn't want to make the switch without checking first. Might check out the Sturisoma and Hemiloricaria too first, however.