jcom
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I've found that 72F - 73F water temps are best (this includes using Hydroguard and Aquashield). It's just a matter of not cutting corners on your chiller. Chillers are expensive (and emit heat/best to have outside flower area, obviously), but they are crucial in RDWC. It's an investment that will pay itself back immediately. If you're running co2 burners, obviously you'll have your room temps 4 - 5F hotter (good thing for plant absorption of co2), but this causes the chiller to work harder. Case in point why it's good to have chiller outside of flower room...the drawback is that you usually have to deal with more/longer vinyl tubing for plumbing, but with the correct safeguards (i.e. hose clamps on chiller and bulkhead connections, etc), you can avoid leaks or floods. p.s. - goes w/o saying, don't put chiller in an area below your rez or you'll get siphoning effect, adding to risk of flood, system drain in the event of a power outage.
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