I have a 125 setup with driftwood and some plants, and soon to be even more plants. However, the problem is that when I kept some bluegill, they were pallid and awful colored. I know bluegill aren't longears and won't look breathtakingly colorful, but they were nice colors when I collected them. I am torn between two ideas to encourage better colors. I need second opinions or alternatives. I want the best coloration from my fish.
Currently I have a pictured background with pool filter sand. I'm thinking of doing:
1.) A black background and a natural colored sand (tan/brown). This would be very inexpensive.
2.) A dark colored plant background from petsmart or any LFS and black sand. Black sand is expensive as hell though, so I would prefer to avoid that.
Any suggestions? Thanks in advance.
Here is my current setup:

Currently I have a pictured background with pool filter sand. I'm thinking of doing:
1.) A black background and a natural colored sand (tan/brown). This would be very inexpensive.
2.) A dark colored plant background from petsmart or any LFS and black sand. Black sand is expensive as hell though, so I would prefer to avoid that.
Any suggestions? Thanks in advance.
Here is my current setup:


