Slight discoloration.

Not sure if this is the sign of worse things to come, so I'm bringing it to the experts.

These appeared after my first nute feeding. 5 weeks in, as they sit in Fox Farm Ocean Forrest, I fed them 1TBSP Big Bloom (Fox Farm), and 1TSP Tiger Bloom (Fox Farm) against 1 gal of water. I went light (about 1/3 strength) but maybe that was to much? I'll let the experts decide. Any ideas? Or am I just to worried about my babies? Of course this is only happening on 1 of the 2. Im at 18/6 with a 400 watt MH. if any other info will help, let me know.

The Tiger bloom isn't meant until flower. During veg it is the Grow Big and Big Bloom. Google to get their feeding chart. In addition, the soil had nutes so you may be overdoing it. I'm not sure what you mean by going light if you used 1Tablespoon of each. That's the recommended dose for Big Bloom and more than the rec for Tiger Bloom during flower.

My tiger bloom says 2-3 tsp (teaspoons) per gallon, and I used 1??

Sorry. I am a foodie. Common nomenclature is a t for teaspoon and T for tablespoon. Still, Tiger Bloom isn't intended until flower so you may be not on target with your NPK.