Aloha Loc Nar

Since you asked.
I grow some CocoDwc girls on the lanai.

I use no benes, -zymes Rhizodahoozits, kaboomaroonis, etc. Just tap water at 120 ppm. 1/2tsp. Calmag per gallon brings it to 200ppm.
Then Dyna-gro, or Dyna-bloom at 1 tsp per G.
That sets the PH in range.
And I'm done until harvest.
Top it off with PH'd tap water.

I do not let my water sit, to "evaporate the chlorine".:wtf:
(That Chloramine may be the secret to my success.)
I make up 5 gallons at a time, pop in an airstone, and were good for about a month.
I do not change out the rez every week.
I do not change out the rez at all, for the entire bloom!:rastasmoke:

Ambient temps here are about 80 F.
Yet, I get no root problems!
No rots, slimes, critters, or molds.
And the root growth is phenomenal

Perhaps I'm just extremely fortunate.

Or, might be, that most hydro advice is parroted misinformation.

Some of that is, no doubt, deliberate.
All that "change it every week" nonsense sell a lot of nutes, yah?

Disclaimer:

I am not advising anyone to follow my sloppy lead here.
I'm just saying, being a lazy buggah is workin' out jus' fine for me so far.
Your milage may vary, yada yada...

Well, you asked.
Cheers
Weezard