I use both Big Bloom and Tiger Bloom from Fox Farms at the same time. I started out using them at 1/4 the recommend strength on the bottle. After one week went to 1/2 then full after that.
I do recommend starting off gentle with nutes but you should be able to use both Juice and Bloom. Its much easier to build up the PPMs then to try to recover from a burn. Also, since I water every three days sometimes four I do a nute watering then a plain water. Its working for me.
Good Luck and happy growing.