Title: You get what you pay for
Product review: This Penn-Plax heater is terribly inconsistent in keeping water temperatures adequate. I've experienced 10 degree fluxtuations when I simply move my tanks across the room. Right now I have three of these horrible heaters and am in the process of replacing all of them. Very touchy control knob/temperature settings to the point where you can just about sneeze near the thing, and find the temperature go up by 6 or so degrees. I have to constantly monitor water temperature with a digital thermometer to keep my fish from baking or freezing with these so-called "heaters." I guess you get what you pay for, and at under $10, these heaters are a waste of money. Go with a Rena Cal, Hydor Theo, or Visi-Therm Deluxe for peace of mind.
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