temp in res issue

Yup the frozen bottles should work just remember to not use plain ice cubes straight in there... just frozen bottles

 

To be honest, I think that res temperature is just a bit overrated. Keep in mind that I'm not saying it is not an important factor, just overrated. If your res temperature is in the mid-80s and above, then yes you should be concerned. However, remember that it's the quality of the water you're using that trumps actual temperature over the water. Plenty of growers on here (including Rumpleforeskin, who has numerous hydro pulls under his belt) have had great success while having water temps at a constant 80F.

That temp may scare people because it's not in the recommended 68-75F range, but remember that those numbers are just that, recommendations. You can go a bit under, and you can go a bit over.

However, if you're that worried about your temps, than frozen water waters is proven method that works. You can also resort to emptying your system every 10-14 days and filling with fresh water and nutes to help prevent bacteria growth.

Just my $.02