I started with the avocado sand then added the lime and finally the tan. Notice how next to the green sand the tan now looks white. Colors always affect each other. I used a sponge mop I have for aquarium use to trowel the three colors in a swirl. Added three fistfuls of river rock gravel and a sprinkling of the claret red gravel for accent which will go with some of the plants. The tan sand I got from another company was ridiculously dusty, powder everywhere...Sandtastik sand needs no rinsing. Shoulda gotten their white sand instead but whatever. Really pleased with the look of the substrate. You can see the bright sparkles in the sand.
Kinda pissed, though. I was going to put the hob filters (aqueon 75s) in the slots but they're like 1/8" too wide because of the lip on the motor mount. So now I have to get 'thinner' filters. The slots are 16" x 2" each. Crap. A delay.
I'll let the sand soak in a few inches of water for the time being. Will probably put the soft caves in too to see if they sink properly.