After removing the water pump and misters the reservoir temp has stabilized around 71f, even nearing the end of the light cycle. Cooler weather and no heat from water pump, I think this will do well even without frozen water bottles. The night cycle will most likely have a higher average temp since lights are off during the day.
I've been adding 0.2ml of Root Guard every 12 hours. Wanted to slowly get up to the 0.8ml recommendation for 4 gallons because there could have been H2O2 in the system. All H2O2 should be broken down by now though. One more dose of Root Guard will get me to the recommended amount.
Edit: Last frozen water bottle was put in at about 10pm on 9/20. You can then see it stabilize after that. I love using these Govee sensors! These charts are a game changer.
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If only I could get my closet water temp to stabilize at 71f.