If he is a double taiked HM then you will likely get some combo of CT and HM. Comb tails and/or half suns is often what they are called. Unless the female carries the double tail gene, you won’t be getting any double tails.
Fun fact! Double tail genes carriers that don’t have notable double lobes will usually have a few extra rays on their dorsal fin. This is a good thing in terms of show quality at it makes the dorsal have a fuller and more appealing spread.
Halfmoon and crowntail are both recessive, if your male is a Halfmoon, the babies should be 100% combtails, (hh x cc = all hc) but honestly finding reliable genetics information on the fin types is hard. I haven’t ever been able to find anything reliable on the heritability of the doubletail effect