09-06-2012, 08:37 AM
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Originally Posted by KremdelaKrem
I just bought a 300 w deep blue heater for my 75 gal freshwater tank. it will turn on but it did not come with instructions on how to set the temperature.
Is there a control knob on top? Many have a graduated temperature 'guide'. If there is a knob and no guide, typically if you rotate clockwise, temperature will increase and rotating counter clockwise to decrease. HOWEVER, adjustments should be very slight and you should wait 12 - 24 hours between adjustments.
If there is no control knob, it could have an internal factory setting of say 78 deg F +/- 2 deg F. I have a few small Tetra heaters like that, but I suspect yours has a control on top???
Let us know and as Byron said, Welcome to TFK - you'll find it's a great place to learn and share.