not sure what tetraborate is, but most of it is micro nutrients with some ewc. sounds like u can make this stuff, basically just beneficial teas, with some azomite. if anything i'd throw a drop or 2 of flora+. but that's basically what ur spraying on ur plants. along with some nitrogen. maybe u can get ammonium nitrate (or even some cal-nitrate) and just put in like 1/16 tsp a gallon. and just use that as a spray. same thing. and lil epsom salt. maybe some sea kelp too. (but that's up to u. sea kelp to my knowledge is known to provide good branching off)
i remember spraying with this solution and i'd get very good results. leaves were a nice shade of green, the plant grew very evenly. kinda sounds like this is what it is. except i was already making it from scratch. see (the magic bullet) from caps' thread
this isnt the magic bullet, but it's what i used to make a foliar spray if i decided to foliar.
Cal-nitrate totally optional, but if ur plants needed some green in them, it'll help.
ewc - 5 gallon bucket worth is prolly like 15 bucks.
azomite - 10 lb i think i saw for 15 bucks
calmag - 20 bucks for a lb to make 1 gall soluable (5ml / gal)
flora + (optional) - 60 a quart i believe. (1ml per gallon tho)
molasses - 10 bux for a lb of raw cane molasses (dry) (1/16tsp per gallon early flower or veg) (1/8tsp per gal mid flower weeks 3-5) (1/4 tsp per gal weeks 6-8)
seaweed - 1 lb bag i think was like 15 bucks
cal-nitrate - 1 lb of it was like 20? ( 1/16tsp per gal )
cap's bennies - 40 bucks a pack.
this can last u a VERY long time.
If i foliar in flowering i like to stop around 3. And anything after, would only be some cal-nitrate with a lil epsom salts, if i start to see some yellowing that i dont like. maybe even a lil bit of molasses as well. i use raw cane molasses now instead of liquid molasses.