what is CSM+B ?
also known as plantex, plantex csm+b, micros, micros and iron...
you'll more than likely want:
kno3 - potassium nitrate
kh2po4 - potassium phosphate
plantex csm+b
and possibly k2so4 - potassium sulfate
check your gh also. if it's lower than 2dgh you'll definitely want barr's gh booster imo. (calcium and magnesium)
best place to get everything... www.aquariumfertilizer.com
or you can get them all local except gh booster (but you can make it if necessary) if you're willing to find them. the sticky in the planted section has a thread with all the product equivalents. the products are a little weird imo. one's a stump remover and another's an enema believe it or not... but they work!