You can dose pure ammonia in order to start the cycle. Ace Hardware brand is the pure stuff. You need something for the bacteria to live on which is why it is important to have some ammo source. You should be able to dose ammo to 2ppm and 24 hours later it is at 0ppm. If that is the case, then you should have enough BB at that point.
If by "straight from the source" means from the ocean, I hope it came from far out at sea, like a mile, otherwise you are gambling with pollution and other yuck. Also your SG
is on the quite high side. For a reef you wanna see 1.026 and for a FOWLR
more like 1.023.