you are right, the temp of the reservoir is crucial but not indicative of a bubbler system, nor an ebb and flow, or drip system. In other words, your reservoir should have cool temps no matter what system you use. Also, ice / 2 liter bottles are an excellent way of cooling a reservoir IF you have temp problems. Low 80's in summer is not that big of a deal. Your res should still stay in the 75F range and that shouldn't be a problem. Not only will temps cause your pH to fluctuate but your pH meter (depending on what type and quality) will also fluctuate based on the temperature.

There are numerous commercial pH buffers on the market. Visit a hydro store or shop online. They come in crystal and liquid forms.
deftdrummer Reviewed by deftdrummer on . cooler bubbler & ph question im just about to build a bubbler system, have been using ebb and flow for years and looking to experiment, and from reading the threads here ive learned that temperature of the resevoir is crucial....in my old setup i kept the resevoir in a remote location so temperature wasnt a problem....well, while at walmart the other day i saw a 30 gallon cooler and thought this could well be the answer to temp problems....i figured if i threw in a couple of 2 liter frozen bottles of water it might just Rating: 5