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What other type of fish do you have in the tank? It is about a 30 gallon tank so a larger fish for population control would work. Think of it as nutritional supplements for your other fish. I have an angelfish that does very well keeping up with the swords.
I recently found out that a large koi angelfish does wonders on guppy fry. He has eaten 20+ fry and 2 adult female guppies. The adults were not intentional, I went away for a weekend and he got hungry.
kribensis12 is right about dropping them in the tank. If I net some fry from my 10g and throw them into my 30g it turns into a feeding frenzy. Diamond tetras also gobble up fry quickly.
bumble bee goby are another great fry eaters,
i had one of each the bumble goby and the peacock eel in my platty/sword/guppy tank to control fry they did an awesome job