They will release with other fish in the tank. Don't sweat it if they eat this spawn. It takes a while for them to get it right. They are delayed mouthbrooders - if I recall they take the eggs/wigglers into their mouth after a couple days.
I used to have 7 in a 75g with a dozen Bleeding Heart Tetras. I had 3 pair. The most prolific pair spawned every couple months but the male was sterile or something because the eggs always fungused. The second most prolific pair spawned maybe 3 times per year and eventually got to the point where they always spat their fry, but then the fry would get picked off over the next few days/weeks.
The 3rd pair only ever spawned once. They would try all the time but always get interrupted by the more dominant fish I guess. The only time they ever actually laid eggs was when the other 2 pairs were spawning at the same time and everyone was left alone. They ate their fry at about the time they would normally take them into their mouth.
I eventually realized that seven 6" - 8" fish in a 75g was not doing anyone any good and I got rid of them. I still regret that.
They're great fish.