ok, so my dads yoyo loaches that are now in my tank are super skinny, i mean they are more or less heads with their bodies skinnier than the width of their little faces. they havent grown since hes had them, and never took care of his tank,they are around 1.5-2 inches long each. i dont know what to feed them on for the best. they seem to want to eat everything i put in there but dont know if they are getting enough as the other fish in the tank are fairly fast. they do sit and eat the algae tabs i put in for a treat for the other fish, and they seem to love the tubifex worms that actually reach the bottom. is there anything i can buy which will be best for them to grow and thrive on?