My fren had a few in his planted tank. Quite easy to maintain actually. They feed on small fishes ............... goes to the top of plant and literally flies in and catch the fishes with their "kheap-Kheap"/ claws and the fishes cut in 2. when no fishes around, they'll start to do come grass and plant cutting...... drastically cut down on your pruning job......... ha hahahaha. Anyway, fren's tank now almost void of plants now!

Hope it helps.

Cheers,

KG