Seedling Problems

Something is not working. Running ebb&flow with water that is 50ppm on meter. Planting bagseed. Nutes added in small amounts yielding ppm of 275 (with water).

Ph is around 6 and the lighting is 125 watt CFL about 12 inches above plants.

Many sprouts but sprout leaves begin to curl and die. Any ideas where to look for the problem.

Same space, seeds and water have worked in the past but not this time.

Thanks.

whats your ph and light your using/distance from plants. but it sounds like your feeding them to early just use water until they have there first set of true leaves