Congrats!!! It the the best affirmation that you are doing everything right. You ADFs are happy and healthy and reward you for all your efforts with the most natural of behaviors.

There is no one right "best food", what worked for me could be very different from what works for "Jenna", both are right. I see that you found your own way that works for you. And I understand not changing the water often... sometimes to too clean tank will remove the micro organisim that naturally will occur in a tank.

Again congrats on your new additions