Here is a good site on selecting a good Local Fish Shop (LFS) and on acclimating your fish.
http://www.aquamaniacs.net/forum/cms_view_article.php?aid=32
In My Opinion (IMO), it is better to forget the Bio-spira. Take your time and save your self some grief. Trust me, in all the years I've been keeping fish I've killed them in more ways than you can imagine. The best way is to take your time and do it right!
EDIT to add closing from the above article.
In closing:
If you absolutely have to float, consider keeping the bag sealed while floating and then do a quick dose and net to avoid the problems that occur when the bag is opened. Here are a few combinations and scenarios to consider, which are much better alternatives to the float methods:
If the fish have been shipped a long distance, over many hours:
- Dose and net.
If the drive was short and you bought your fish from a reputable dealer with similar water parameters:
- Dose & net or just quickly net.
If you are absolutely certain of the conditions in the tank that the fish are coming out of, or the distance between tanks is short:
- Dose & dump, dose and net, or just dump or net.
The need to float newly acquired fish is one of the most common misconceptions in the aquarium hobby. Hopefully, you will take the time to practice some of the other techniques and further develop your fish selection and acclimation skills. The time to start off the right way is now