High resivor temps

I have been fighting high resivor temps. I haven't seen any negitive effects on growth. I'm nearing the end of veging and am waiting for my mini fridge chiller I ordered on line so who knows ? It's $300 so it's probly nice. I just don't think I'll have it for a couple weeks and am afraid of what it can do to the plants. I'm using a fan to blow over the resivor trying to blow out some hot air then I also have constant ice bottles as much as my time is permitied . I have been able to keep the temps around 76-78 degrees and as low as 74 deg. I just can't get the 66 deg I want. So I'm using hygrozyme to help keep problems at bay. Will this tec work for a couple weeks atleast till I get my chiller? What should I look for?

Plus I'm using two large air stones in the resivor as well as 45 gallons for 12 pots ,using the ebb n grow by cap.

hygrozyme did not help my root rot problem but I started after the roots showed signs of a problem. I know some people use h2o2 never tried it I use bobs brew Time will tell if this works. Im sure you will get more advice tomorrow when people are awake. Good luck

Yea it's late But my plants think it's early. Quite confusing with the rest of the world. I thought I wasn't the only one who can't sleep?