Substrate
Using Eco-complete in a 55 gallon tank. Pretty lightly stocked, 3 guppies, 2 otos, 7 harlequin Rasboras. Fairly lightly planted as well with 3 smaller crypts, three clumps of giant hair grass (to add some early height), 4 smaller Amazon swords, 1 red melon sword
Never had detectable ammonia or...