Watch that stuff, incorrect dosage will kill LPS.
You need to calculate the daily usage of CA in PPM, then apply the dosing rule as per manufacturers instructions.
BTW....I have been dosing 2.5 ml per day of A,B,C,and D, in a 70g for more than a year.
I have noticed no change whatsoever and will shortly discontinue.
Yes, you can test, but expensive and time consuming, not overly accurate either.