Should I kept going or game over?

None of that is permanent damage and your grow lights make it look more pale than it really is. No reason to throw it out. If you provide a bit more than is needed, it will fill back in... just make sure it doesn't go too far the other way as you go. may need to dial up initially, then slightly dial back later. You can see initial stages of chlorosis under intense lighting long before you would in normal lighting. It kinda helps to see it earlier, too. You can adjust your formula in a more timely manner. but, take a look under normal light... try to familiarize yourself with how to translate what you see under the grow lights as far as paling/color of leaves. I bet these plants look fine under less intense light. But trust the paleness you more easily see creeping in under the high intensity lights, just don't overreact to it. I'm assuming the 'tripack' has nutrients? silica and fulvic acid on its own won't feed a plant. You are in hydro, you need to be providing 100% of the diet at all times.. there's no mad scientist add this or that in some elaborate scheme -- though you may need a slight shift in flower or transition to flower etc... for the most part consistency is better than elaborate sophistry. The levels of nutes commonly used in soilless/hydro context is fine for a young plant, too. So 1.0-1.5 EC (excluding what tap adds or non-nutrient additives used) is fine even for a fairly young plant. I'm in soilles. I start giving full strength on the 2nd irrigation and the promix i use comes with a ~1ec charge, so it's really getting it from the start. If the plant is paling, it clearly wants/needs more. Keep up with it regarldess of what 'should be' .. reality of the particular plant in front of you matters more than "should be" Observe and adjust.. take notes... avoid the problems next time. HYdro allows for complete control and if systematic, you'll have near perfect runs quickly. Good formulas will work on 90-95% of plants, and even with the ones it is less effective shouldn't be a major problem to mitigate. Keep adapting till you get there.