Sprouts are great during breeding season! Mine get them from mid-spring all the way to when they are halfway through molting - only I don't use a fancy sprouter but an old pickle jar
[actually two because it takes one day of soaking and three days of sprouting so I always have one 'cooking']. I don't give my birds any clay or spirulina. I don't believe that clay has any benefits to captive-kept birds so feeding them dirt makes no sense to me. And I don't like to give them anything that has too much of anything and/or it's completely unnatural to their diet like any type of algae. This aside from the fact that all algae products have too much iron, sodium, potassium, magnesium and iodine [more is not better when it comes to birds - quite the contrary, less is better]. My birds eat a very varied, organic, healthy diet and, although I do give them vitamins, it's a very small amount, only twice a week and mainly D3 but, of course, birds that don't eat produce and are on seeds [not pellets which already contain a bit too much of everything, too] need more than just twice a week.