I’m planning in the near future to set up a low tech (no CO2), heavily planted species only tank for dwarf puffers. I’m literally just in the planning stages right now. I plan to use the Fluval Flex 15 gal, Carib Sea Eco Complete for substrate and low to med light plants that closely match the type of plants that would be native to this particular fish species. Not exactly a biotope but as close as I can get. Has anyone here done this and what type of plants do you recommend? I have amazon swords already that are throwing off baby plants like crazy (I know, not native), but one might end up in the tank anyway. What else? I’m also up for other suggestions regarding substrate.