The leaf curl is a sign of environmental stress, tomatoes need more than fish emulsion, yes. N-P-K doesn't need to be very high, but should read more like a N3-P4-K6. N is your top growth, too much N(itrogen) makes all plant and no fruits. P(hosphorus) is to encourage blooms -K(Potassium) is for overall plant health and disease resistance.
Too much fertilizer, or too high NPK can slowly cause the stems to turn woody and quit taking up any nutrients at all.
Yellow is usually a water issue - too much or too little turns leaves yellow, especially if the weather is cool...soils below 50* cause a plant to stop taking up water as fast.
I had to go refresh my memories really quick. You DO NOT get a 5-11-11 by mixing those 2 fertilizers together, I believe it is done by weights and depending on the weight you could get more like 3-6-6 instead of a 5-11-11 - NO I didn't do the math outright but you needed an example and that is a rough estimate. THERE IS a formula you can use to come up with what you are actually getting when you mix fertilizers.
