If you have Hikari Micro Pellets (used to be called Micro Bites) where you live.
Amazon.com: Hikari Tropical Micro Pellets 45 Gm: Pet Supplies
These are great and don't screw up your water parameters as quickly, like flakes do (cause ammonia spikes). If your fishes mouthes are slightly smaller you can rub the pellets together in your fingers to make them smaller sized pieces. I find this size to be excellent for adult Tetras and I use it for smaller fish and crush them down some for their smaller mouths.
The Hikari Bottom Feeder wafers and the Algae wafers are great for Cories too. I like all their products. They don't cloud the water.
Feed the fish conservatively. I would take a normal amount and feed 1/2 am and pm (if you are home all day long you can divide one days food into 3 feedings if you find feeding the fish a fun thing to do, just don't feed full feedings 3x per day lol). You can give them a good variety of foods.
Uneaten food will wreak havoc on your water quality. It is a fact fish will eat even when they don't need to, always acting hungry.
Also 12 hours is a little long for the light. If you use a timer, just cut out/turn off the light for a 2-6 hour period in the middle of the day and have it come on when you are home, so you can see and enjoy them.
Dividing the photo period of light will interrupt the algae growth cycle from what my fish and aquarium plant book told me and since doing that I have a much lower issue with algae.