I'm in the middle of treating ich and i'm having issues keeping my tank at 28 degrees celsius. I have 3 methods of measuring temperature.
1) liquid crystal strip - says 25 degrees
2) floating alcohol based thermometer - says 25 degrees
3) the thermometer built into my heater - says 29 degrees
So i'm guessing my current heater which is a Marineland 150 watt (recommended up to 40 gallons) is out to lunch but i just bought and replaced my Fluval heater which was registering a temperature of 27 but my other two thermometers consistently display 3-4 degrees lower...
Causes?...
a) not enough water circulation around heater
b.) heaters are garbage
c) other two methods of temperature measurement are inaccurate
If anyone has good experience with a particular heater or an opinion / advice i would greatly appreciate it. Thanks