Few co2 questions..........HELP!!

First off my room is 15x10x9.. I am running 3 1000 watt ballast which are air cooled. My major concern is temperature due to using a burner type co 2 generator. I've always heard and read that 85 was optimal with co2 use, Is this correct? What is a safe range to go by?

Also, I'm growing in igloo marine coolers . Is it normal for ph levels to fluctuate through the day?

Yeah Co2 is good up to the high 80's but I wouldnt want it there.. 85 is good with Co2. So you are growing DWC I assume?? Your PH fluctuates ?/ How so?? Are you taking PH readings inside the igloo with the bubbles? Take a sample in a clean cup and do your reading with that water.
A good tip for DWC and PH is to set it about 5.5 and let it work its way up to 6.3 or so. This way the roots will eat the required nutes different nutes work at different PH ranges. Also if DWC I cant stress this enough keep your water cool like 60-70 degrees is perfect.

With co2 air temp isn't as big of a deal as it is without it....you can easily go into the 90's and have no problem, as long as there is good airflow in the room. What you have to watch is the tem of the res. You will prob have to get a chiller, and keep that water down to the mid 70's. You can get a nice one for $300 to $500 bucks. This will help to prevent root rot, nute lockout, and stress that can cause hermies.

This is info learned the hard way. It's free for you.....costed me I'd say $15K.

edit......should read the above post.....sorry bro.

Yea I'm using igloo coolers and yes I check inside the cooler. I will definitely take a sample out from now on. I have always been between 5.6 and 6.5 ph having very good results. Just been really watch them rise through day to somewhere in low sixes and in early morning back in the fives. Coolers keep me at 70 or less... This co2 thing is just impossible to control climate for me.