I think they came out great,
you did a really good job.
I hope you can keep the genetics going.
If you cross any exotic males to some of those strains
I want to be in your test pilot program.
.
I think what is happening,
you are root bound.
The top of the roots get too dry
and the bottom of the root
doesn't get dry enough
You might get away with it
if you add more drainage holes
so the bottom will get dry
at the same rate as the top.
Then you may need to water more...
The more expensive Pinpoint is very accurate
the probe is easy to replace
and can even upgrade to LAB Grade probes .
The tds pens are pretty cheap
and semi reliable
Precision is not as important when measuring tds
as it is with when measuring pH
Cheaper tds meters will not last...
You really need a digital pH meter to get your pH in parameter.
I would suggest a Pinpoint from ebay for about $100
Then you need to get some 4 & 7 calibration fluid
and plan on changing the probe every other grow or once a year.
All the seeds I have are big plants,
and they take a 14 week bloom cycle,
not real suitable for cab growing.
I am hoping to make some more indica leaning varieties
but it will take a while.
Hopefully by next year.
I got my first seeds from 'high grade seeds'
they guarantee delivery to...