Been quite a while since I added to this. The school of Harlequins died from some disease that I think was either Neon Tetra Disease or False Neon Tetra Disease. Only one survived.
I took out the dirt substrate. It was just too messy with all the stem plants that I have. I tried kitty litter, but that was an utter disaster. So I used Turface which I am very happy with.
I replaced the school of rasboras with a school of albino glowlight tetras and a school of black neons.