You mentioned your parakeets like seeds but as we discussed an all seed diet requires additional nutritional supplementation.
Goldenfeast Bird Food for Parakeets, Parrotlets – Petite Hookbill Legume Formula 25 oz
Seeds and other good stuff found here http://goo.gl/X4ic1
Nice seed mix from Hagen found here; http://goo.gl/j2mnp
Higgins Nederland’s Vita Seed Bird Food – Parakeet 5 lb
Straight seed diet found here: http://goo.gl/XCsJC
Hope that helps, let me know if you need more suggestions
Windy City parrot