You can get from our sponsers here. The chiller size depends on how big is ur tank. think u can go for resun as its quite cheap compare to other brands.
what lighting are u using? i think ur temp is abit hot leh. i think best to keep fishes
below 30, ur fishes will be happier
you can go to pasir ris farms there perhaps can grab some goodies
brasslets are agressive .. best to only keep one
good luck
cheers