1st Hydro Grow, pics and Q's...help

One important Q!!! I have a 6 gallon resevoir, do I top the resevoir one day with water and the next day with 1/4 str. nutes? adding nutes boosts my ppm, I think it's already too high? no?

Day 12 of flower

ppm 1180
ph 5.2
ec 1.87

Does this look ok?

I have an ebb and flow set up, flood and drain, whatever. 400 watt hps 12/12.

temp 76.8
humidity: 44 %

Does this look ok?

my second time growing and first time in hydro and it looks good to me

you may want to glance over this thread (where i get a clue on how to feed):
https://www.rollitup.org/hydroponics-aeroponics/41552-ppm-question.html

It looks just fine. Your nute strength will change as you flood, and you can top off with plain water to keep the level the same. With a smaller res size, you will have to maintain it daily or more often, but it will work. Just keep a close eye on it. Your pH is at the bottom of the range, so let it rise to 6 before correcting.

HTH