In all honesty ... any simple timer works ... no need to get all advanced. A relative gave me a simple hourly timer ... no setting 15 min intervals ect ... with the intent of getting one that was more customizable ... but what I have does the job.
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.