I use only the Beastie Bloomz soluble. When I got the nutes, I asked the guy which he recommended if I were to only get one or possibly two of them since they're $35 each. I guess the Beastie is the best seller around here & it seems to do the job for me. I use it the entire flowering cycle except the first week and the last two weeks, 1/4 tsp per gal to start out with then working up to 1/2 tsp by the 3rd week of use.