What type of fertilizer should I use

I have some plants I started growing inside. I'm growing them hydro and they are growing fast. I bought a vegetation and flowering fertilizer. The problem is when I introduce the fertilizer that the local hydro shop sold me they get fertilizer burn even if I only give them a little. Anyone have any suggestions of what I should try? My plants are growing but they are getting yellow spots from living on water.

General Hydroponics is a safe bet. Fox Farms is highly regarded as well. Advanced Nutrients is expensive, however they have high reviews from everyone who uses it.

I started out using Fox Farm and it worked great for me I just started using Advanced Connoisseur A+B lets see if its as good as they say