Um, not too sure if this is correct but i was told not to blow in the bag as you blow Carbon Dioxide, not oxygen. I have always used my pump to blow up the bags. (squeezing the tops etc) Plastic box sell decent sized poly boxes for $10 if theyre for your oscars. Something fishy will sell you good fish bags or on TM, ppl have them for sale there. I just use freezer bags, doubled and tie the corners if theyre small fish. Phil Collis on here sells the heat pads about $35 for 10 i think. or i have some new 40hr ones around, i brought off him. Let me know if you need any help.