Hello ! Sorry I haven't been around lately.
High ammonia is from not enough good bacteria in your tank. Usually from not enough bio-filtration, i.e
live sand,
live rock or bio-balls. Some times it from a die-off from adding live rock that isn't cured yet. Or over feeding, because your live rock (bio-filter) can't keep up to the demand. The cycle booster should help. Bio Spira is real good too !
What are your exact water parameters ?
ammonia, nitrites, nitrates ?
What are you using for water flow ? Powerheads ?