I will shortly be setting up a new 260 litre aquarium, and can't decide what substrate to use. To be honest i've only ever used normal gravel, but i want to promote the plant growth in as many ways as possible so thought about using possibly Tetraplant Complete substrate, and adding 1-3mm sized gravel on top of it, or possibly using Dennerle DeponitMix Professional Substrate. Does anyone know anything about this product. I don't think you need anything on top of this one, but i'm not sure. Any help will be gratefully received.