It’s been years since I’ve kept fish and am super excited to get back into the hobby. We picked up a fixer-upper 29 gallon from offer up yesterday and plan on spending the next couple of weeks setting it up and cycling it properly. I’m considering just a small sorority of koi betta (my son REALLLY wants “goldfish,” but not just one of course. I love Betta fish and thought this might be a good alternative for our tastes and the stocking limitations of a 29gallon) and plan on planting the tank and using driftwood - but what color substrate would work best and be most functional? I really love the idea of using white pebbles or sand but am reading that those substrates might not be best for plants. Suggestions? Also, would the white wash out the color of the Betta? Thanks!