If you like the gravel and it's actual pea sized rock (some gravel is glass like) pieces, I'd say go ahead and boil it ... that's what I'd do if I inherited gravel I really liked.
75g Planted Barbs Denison, BlackRuby, Tiger, Albino Tiger, Green Tiger, Cherry, Gold, Checkered, Odessa.
NonBarbs Cardinal, Neon, RummyNose, Bloodfin Tetras, Z. Danios. 1RTS. Amano, Bamboo, Ghost & RCS. 20g Long Shrimp Tank RCS, Tiger, Amano.