Prime for water conditioner is all I'll ever use.
I also like Seachem's Flourish line if your going into plants.
Stay away from topfin heaters. I used to like them but I've found that after about 6 months they ALL crap out. I've had to buy two heaters in one week because both broke. One stopped heating effectively and the other had my tank at 90*F. I now use Marineland Stealth pro heaters if I need to buy locally. If I have time to order online I get hydor theos... awesome heater!
Foods.. live is best. My guys die over their white worms.. they love them to death.
NLS Betta, Small fish, and Grow.. I feed a mix of these
Attinsons Betta and Betta pro
HBH Betta Bites
(the last two I haven't actually tried but I really want to.. just too expensive for me right now).
Frozen.. I stick with hikari brand.
Filters.. Marineland is great and I also like Aqueon.
is where I got my plants from. Nice plants but not labeled was my only issue. Great snails too!
Eclipse tank kits are great. I'd love to have another eclipse 3 (or two).
Eco-complete is my favorite substrate (if your going planted).
I like these air pumps.. extremely quiet.