As long as you don't overwater your plant (with the diluted fertilizer), and you use the correct amount of fertilizer per amount of water—and your plant could use the fertilizer—you should be fine in giving it however much you want, in one fertilization. By implication, and my observations in doing it with a number of fertilizers, that seems to be what is expected. I've never seen anyone say differently. So the direct answer is no; there isn't a recommended amount, as far as I've seen.
Tomorite instructions here say to mix 20ml of Tomorite in 4.5 liters of water. You'll see that sort of thing on fertilizer packages; you won't see how much of the already-combined fertilizer-water to pour into the soil. You will likely see how often to apply it (but be careful there, as recommendations aren't always perfect, particularly in that they don't say how many applications in a row are safe, and it's not always safe to do it indefinitely).
Indoor plants generally require less fertilizer per amount of water. I'm guessing the recommendation above was for outdoor plants.
Anyway, how much water to give your plants depends on how big they are (the more leaves they have, the more water they'll use; even if you prune off leaves, they'll use less water), how big the containers are, and stuff like that. If your plants are large, in good-sized containers, the amount you're using sounds okay. If they're seedlings that's way too much.
It's generally best to fertilize when you water, to avoid overwatering, unless you do foliar sprays.