FlytrapCare Carnivorous Plant Forums

It kinda depends on the size of the plant, but Maxsea isn't necessary at all as long as the plants are getting decent enough light.
That being said, for seedlings, I usually don't do anything as they're so small even a little bit of Maxsea in a 1/4 tsp per gallon solution can be too strong and burn them out. For bigger plantlets, a light foliar spray works well. For juvenile to adult plants, I use a small syringe and put a single drop on a few paddles per plant.
Time of year can also play a factor. Winter time, shorter photoperiod and sunlight filtered through a window, is when I do it just to give them a little extra through the lean months. Maybe a couple light applications in the Spring as well for my temperate dews as they are waking up.
If you have fish food, use it, but just enough to feed a paddle or two as a lot of fish food has copper and other trace metals, as well as added sodium, that can be harmful to carnivorous plants, and vegetative ingredients that are useless to carnivorous plants.

You still run the risk of burning them out because of the difficulty of giving them a small enough amount that they can handle. A couple people have shown what they use, a small crafting syringe with a tiny pointed end, to put a very small droplet right on a paddle, but they've been doing it for years and know almost by feel when to stop.
My suggestion for seedlings is to do nothing with fertilizer, put them in a bright spot, and wait for them to grow more. Burmannii tend to stall out at the seedling stage, then some will just take off. Wait for that to happen, and focus on those.