I have big male he is black and blue and 2 females they have bin living together sins april this year and it has not bin a problem now i got a bigger thank for them and they have sparwned but now the eggs are gone

from other treads here I can see it should be a big problem for them to live together in the same thank is that why the eggs are gone?
what do i do next time there are some eggs? should i sepperate the grown fish from the eggs ore only the females?
My male fish i well over 2 years now and i would love to have some babys from him he is really beutiful and nice tempered.
Thankyou so much for the info
Sari