Warm vs. Cold

First time growing. Not a complete tard though. I understand the basis of what i am doing with my indoor DWC system and i understand what it is that will grow marijuana. Its a weed, grows like wild fire. But, i am now looking at ways of perfecting my growing.
1 of the questions i have is: What should the water temperature be for my babies? does warm water promote more growth as to room temperature water? i understand cold water will shock and be too much for them. I only ask because right now with no lamp on for the beginning stages, there is no light to bring heat to my closet so i keep the water warm with my aquarium heater. its not blazing hot but its a nice luke warm temperature. the babes have sprouted through and are looking good but i just figured ide ask u boys.

65'ish to 75'ish is a good temperature range for the water. Cooler water is better: The colder the water, the higher the dissolved oxygen content can be. More oxygen at the root zone equates to faster growth. More oxygen keeps pathogenic anaerobic bacteria at bay and discourages other types of pathogens while allowing beneficial aerobic bacteria to thrive.

[18-24'ish Celsius by the way]

thank you for the clarifying. Ill lower the temp right meow.