Sorry for making 2 posts here in one day, but I was wondering if anyone had recommendations for some good non-fish poop machines to add to a fairy low-tech planted nano? My tank is 5.5g with a gravel bed, a single Coralife 50-50 bulb, and Flourish in tabs and in the water column. The current stocking is 3 scarlet badis and a sizeable population of "pest" ramshorn snails that are doing a great job at keeping the algae away, as well as whatever blackworms have escaped the jaws of the badis and are living in the substrate. I was originally thinking of adding a couple more vertebrate livestock, but seeing how territorial the badis get, I'm thinking of leaving them as the only fish. Unfortunately, they're really not very dirty, which would be great if I wasn't trying to grow plants, so I was wondering if there were any "dirty" inverts that would produce some more fertilizer for the plants without bothering the badis. Maybe an assassin snail to keep the ramshorns in check? I'll look for a macro fertilizer if I need, but I'd rather go the more "natural" route so I don't have to worry about manually dosing as much. And of course, here's a picture of the tank, since what thread is complete without one?