formulex
http://www.1-hydroponics.co.uk/nutri...-additives.htm

It looks like a product for seedlings 10ml per gallon. I think it would be OK
You can try it. you know you are just starting, and you have to learn your own products. If you have doubts, then; Start with 5ml per gallon for a week, unless you know someone that has used this product and knows it works.
after a week, if your plants have good roots growth/look good and strong, go to your veg nutes...What are you going to use?