Discus isn't easy.. From my experience you need pristine water quality.
If you want some color, go for a school of bosemani rainbows coupled with a school of red or green turqiouse rainbows with angelicus loaches, plus live plants.
Make a wall of lava rock. see:
[YT]Fx1_bk0dvuQ[/YT]
and...
[YT]DS8_34dgOI4[/YT]
Where did you get that
any large garden supply or home improvement store with a garden section shop should carry it.
could you hypothetically get your gravel at the same place?