Heyhey- I've had success (meaning they lived years, were active, built nests, etc.) in the past with bettas in bowls. I know, I know, be patient.... I've recently restarted with two plakats, and after researching more fully, am less ignorant. In the past I did frequent partial and weekly full water changes, using well water with a tap water conditioner. I will have to continue doing at least frequent partial water changes in the 2.5g ponds, until I get a small filter/waterfall/fountain set up, but.... I never used aquarium salt in the past, should I now? If so, how much, and how often, as it won't be cycling? And, should I use Fluval Aqua plus (which is what I've been using on the two new guys), Or, Tetra Easy Balance plus, Or some combination of both? I am also establishing a small number of plants and snails in each pond, and will be building sleeping spots. Thanks in advance for your expertise, everyone!