N/P Reducing Pellets ("Solid Vodka") - "Wow" ... 3 month update

[balistidae]

I have been battling hair algae in my 28g nano cube and have tried almost everything, now as a last resort I am interested in giving these new n/p pellets a go.
Seeing how there is no room for a reactor on the tank I am wondering if I could bag the pellets and just put them in the overflow chamber? I could maybe take the bag out every few days and give it a shake. Would there be enough movement for this to work? Any other ideas how to add them reactor-less?

Thanks all!