greenhouse water system
I posted below question on plumbing forum as I would like to hear from plumbers as Ineeded professional advice, apparently moderator didn't let me hear the answer to that question and sent me here, so her it is:
I need to use about 800 liters of water for irrigation of the greenhouse during 24 hour periods (so it is going to be every 30 mins around 20 litres in each go, most likely, water temperature should be between 16 celcius and 23C. How should I go about keeping temperature constant? DO I just install 1 tonn tank and heat it? but I didn't fund anything like it on the market, another way I thought was to have small tank with hot water (just like the one in household and use thermal valve to mix cold water from the in line and hot water from the hotwatertank, but I don't know if thremal valve can keep water at 19C plus/minus 2/3 degrees without too much deviation, besides all thermal valves are for hot water applications and I don't know if they can be adjusted for 'warm' water that I need. If someone has knowledge in this field please let me know. Thank you in advance.
Ps It is not marihuana grow up.