Cheap water cooler

Not sure, just GH three part.
Yeah any way I mix it.

If your nutes contain ascorbic acid or sodium ascorbate also known as vitamin C it neutralizes chlorine.

Think citric acid would have the same effect?

5BY5LEC said:

Think citric acid would have the same effect?

Click to expand...

Not to my knowledge

https://manicbotanix.com/disinfection-in-hydroponics-root-disease-prevention/
"For example, Paul Fischer (2011) found that when chlorine was applied at 2.6ppm to a broad spectrum nutrient solution containing 200ppm of N at PH 6.0, chlorine levels fell to almost zero within 2 minutes of application."

5BY5LEC said:

https://manicbotanix.com/disinfection-in-hydroponics-root-disease-prevention/
"For example, Paul Fischer (2011) found that when chlorine was applied at 2.6ppm to a broad spectrum nutrient solution containing 200ppm of N at PH 6.0, chlorine levels fell to almost zero within 2 minutes of application."

Click to expand...

Ah I know why the chlorine reacts with the nitrogen and is destroyed I think it then forms chlorine gas? I can't fully remember. Chlorine reacts with organic nitrogen

This explains why it is needed so often to keep a sterile res. I run live so never really looked into it

Keesje said:

or pumping your water to another colder room) this can be achieved.

Click to expand...

i use a heatexchanger to put the heat in - and pump it to my shower to release

in hot summer (when i do not grow in my flat) i use the same combination of heatexchanger & led lamp to keep my apartment cool.
Filling the heatexchanger with fresh service water (15°C) in the morning. I use my led lamp body as a chiller only spending 10W on a little pump and two ventilators. A little ventilated waterfall help (~ 1 gal of water is vaporizing / day)
me to keep my apartment ~ 3°C cooler .
Next morning the heat exchanger has a temp. of ~25°C - perfect shower for me on hot summer days with 40°C