I use the 5g from HD al well.
I was reading one should aerate (sp) water with a power head or something (also helps mix salt water) and leave salt water pre mixed for a few days.
I fiqured insead of having to mix salt every weekend (which is what it feels like), I can spend the day doing it once, and make and store a bulk amount.
thanks for the responce..........(don't steal my idea, jk, ha, ha).