Best thing I did in the last couple of months was to pack the tank with fast-growing plants. The density and growth of Ludwigia repens and Rotala indica have brought my opportunistic algae problems to a complete halt. Complete.

The bottom photo shows my vigilant Rocket killifish, one of two, who occupies the upper layer of the tank while shrimp, small Rasbora, and another killifish lurk deeper in the tank and foliage.