Like I said, I've not tried either of the recipes yet. In fact, I'm just getting into hydroponics myself, so anything anyone here says that contradicts me is probably more correct.
According to this site:
Reasons Why Tomato Plants Leaves Turn Yellow
tomato plants yellow due to a lack of nitrogen, sunshine, or water. Pests & fungus can also cause yellowing. Too much nitrogen usually gives abundant foliage growth, but poor fruiting. Check to make sure they're getting enough water and try giving them a bit less nitrogen and a bit more phosphorus (if you can't find Phosphorus, grind up some eggshells and bake them until they just start turning brown. eggshells contain about 1% nitrogen, about 0.5% phosphoric acid.
If they're not getting enough sun, you may want to supliment them with a flourescent light (if you can't find one for plants, get one that says "cool white"; it's got more blue in it, which is what plants need to grow). You could also try an
led growlight. Here's a company in Hong Kong that sells them for a good price (no, I'm not affiliated):
Besthongkong - Eastern LED Source Shop: Loose LED, High Power LED, Car Auto LED, LED Light bulbs, LED Strips, LED Flashlight, LED Module LED Growing
lights
If you do try the chicken manure compost tea, you may have trouble with clogging in an aerophonic system. If it were me, I'd grow the plants in aquarium gravel (you should be able to find one of those "wet markets" that sells pets & pet supplies pretty easily) with a drip-feed system.
Something else to keep in mind; are your tomatoes all female, or all male? If they're mixed, do they get any kind of breeze blowing past them to spread pollen? No pollen = no fruit.
