Keep notes an your observations of EC drift, pH drift, total water usage, temperature range, and comments on crop health and progress. Look out for diseases and remove and destroy sick plants immediately. The aquaculture or fish farming people have developed excellent chillers. Fish don't like water that's too hot or too cold either. Don't be overwhelmed or intimidated.
Plants can tolerate quite a lot of stress and still produce well.
On the other hand, the grower who knows the questions. and how to find answers, is the one who will have consistently good crops. It is far easier to avoid problems through knowledge and proper technique than to fix them after they arise.