I added a CO₂ canister a couple months ago, and a month ago I began adding Seachem Flourish.

Also, since I last updated, I changed the driftwood and the livestock has changed. I lost most of my cories and my sparkling gourami, the latter I assume from old age. So, current stock is 1 pygmy cory (all by himself, I'm planning on fixing that), 3 ember tetras (I managed to track down one to add to my two, but have yet to find more), 7 Rasbora hengeli, and 1 male guppy (who is getting moved to the 45 gallon and is being replaced by a betta).