ah, okay. no. the water has to be freezing or colder. i run hydroponics 90% of the time. i fill a 100 gal rez with ice (5 gal pails frozen in a deep freeze), then top off with water. for a long time the water temp goes below 32 or 0 degrees. as there is more ice the water. that is what you want, ice water. the whole point is to "shock" your plants. a gradual decrease would not have the impact. dont be cheap, buy or make the ice forthe water, ), d
Gangster!
D, you didn't give me that tidbit when I asked. LOL
5g buckets in a deep freeze.
Now I have to buy one damn you. Now I feel yah.
Shock = Freezing water. (Roger that!)