Submersible Aquarium Heater 300W 100W 200W, Fish Tank Water Heater And Thermometer With Adjustable Temperature For 20 Gallon,30 Gallon, 50 Gallon Tank,With 2 Pieces Suction Cup Suckers 200W

Important information about this item – Check your heater before use carefully we will send you a replacement if you find any cracks on itemwe can’t prevent the occurrence of small cracks during transportation because of the characteristics of the material. – The aquarium heater need to be submersible totally. Do not energize the heater in the air because it heats up extremely quickly in the air. – Power off 10 minutes in advance then move out the heater if you need to change the water for fish tank. -It can be installed horizontally near the bottom of the tank or even vertically. Arguably setting your aquarium heater in a horizontal position is the more effective way because heat rises and disperse better.The heater should be placed in the water flow and not in a stagnant and shallow water area – Allow the heater to rest in your aquarium for at least 15 to 30 minutes prior to turning it on.This allows the glass casing time to adjust to any temperature change and prevents it from fracturing. – The red light indicates that the heater is working you should rotate the red button to adjust the suitable temperature to what you want before you put it into the tank. – Use a thermometer to measure the water temperature the temperature of the aquarium heater only represents the temperature at which the aquarium heater is heating. Place your thermometer in your aquarium opposite your submersible heater. – Make the power cable a drip ring shape to avoid the water flow into the socket through the power cable if the power socket is set lower than the fish tank. – Allow your submersible heater to operate for 24 hours then check your aquarium temperature.Adjust your thermostat up or down accordingly and recheck your temperature every four to six hours until your desired temperature is reached.