Yoyo loach getting enough food?

[Tsaye]

Have a 30gal. tank with neon tetras, zebra danios, cherry barbs, 2 dwarf gouramis and 3 yoyo loaches. I feed them twice a day, in the morning and at night. They get flakes in the morning and frozen blood worms at night. I put enough food that it is eaten in 30 seconds, all the other fish come to the top and eat it before any floats down. I'm worried the yoyos aren't getting anything to eat. I don't want to over feed the fish, I added more than usual this morning hoping some would sink to the bottom for them but the fish once again ate it all. Should I increase the amount of food or is there something else I can buy for them. Do they like algae wafers? They are still small, only about 1.5-2 inches. I put a small piece of lettuce in there and they loved it but I want them to have a balanced diet. Any suggestions would be appreciated!