I’ve had this tank running for almost 2 months now. i feel that my plants are dying and i believe it might be my substrate. i just have black sand in there. also is it overcrowded? i have about 15 black neon tetras, 3 bolivian rams, and a pleco. this is a 20 tall with one sponge filter and a regular 10-50 gallon filter inside. i know there’s a plant floating, i have to place it back in the sand.