there are already some good instructions here
some of what I say will be just to agree with whats been said
like gypsy dog said;
knowing that your source water has 20ppm Ca is very useful
the calcium is also why your source water ph is at a nice 7.5 from the lime in the earch that's in your supply
that's about the best water you can ask for
you shouldn't need any or much calmag with that amount in the source, but you will need some Epsom salt for magnesium
using bleach is fine if you do it proper, but these days bleach comes in many different strengths... its easy to accidentally over do it on the bleach and h202 would be a safer choice
I wouldn't use any bleach on plants that aren't well established and larger... the risk issues on small plants like that increase
im not saying don't use bleach, if you do it proper its fine
I cant recall the dose I used when I did it many many years ago
but not on plants that small
mixing your nutes
redhydro had it right
those plants should be getting something around
3mls grow
3mls micro
3mls bloom
0.5 grams (max) of Epsom salt per gallon (1/8 tsp)
full strength veg formula
7.5 mls grow
5mls micro
2.5 mls bloom
1 gram (max) Epsom salt per gallon (1/4 tsp)
full strength bloom formula (option 1 with kool blom)
2.5 mls grow
5mls micro
7.5 mls bloom
1mls kool bloom
0.5 grams Epsom
full strength bloom formula (option 2 no kool bloom)
6mls grow
3mls micro
6mls bloom
2mls calmag
full strength late bloom formula (optional to leach N and boost P in late bloom)
0mls grow
6mls micro
12mls bloom
always mix your fertilizer the same
for a weaker solution mix it the same way but with more water
for a stronger solution mix it the same way but with less water
keep a daily log of your ppm and ph and
manage your reservoir with these rules in mind
PPM/EC goes up, ph goes down lower nutes
ppm/EC goes down ph goes up raise nutes
ideally your ph will swing up slow over the week, if it swings fast over night the solution is too weak
if the ph doesn't go up and or goes down your solution is too strong
mix a batch at 2mls grow, 2mls micro, 2 mls bloom and give them a good flush
then mix a new reservoir at the ratios I gave you above
3mls grow
3mls micro
3mls bloom
0.5 grams Epsom salt per gallon
and then start logging the journal
stop using the bleach for now and use h202 at least until there larger and healthy
when you see rapid growth and the ppms are dropping and the ph is rising start to increase your solution ppm and switch to the veg formula ( I don't mean the full strength formula, I mean mix it the same as the veg formula but diluted to the appropriate ppm)
mix your 50 gallon reservoir 1/2 to 3/4 full with full strength veg formula and then top off with water until you reach the desired ppm
the third bloom option that leaches N isn't really something I do but its an option if you want it
note; the formulas above are taking into account your 20ppm of Ca in your source water... if your source water doesn't have the 20ppm you may need additional calmag but not for any reason would you need more than 4mls per gallon even if you had zero calcium in your source water