First of all, there is no separate electric energy meter, which can only be estimated by the power or current of your oxygen pump, and there will be a certain deviation.
Method 1: Look for the pump nameplate to check the power. For example, if it is marked 150W, that means your pump uses 150W of electricity per hour.
Then if you turn it on 24 hours a day, it will be 150*24=3600W, 1000w= 1 kilowatt hour, which means you will consume 3.6 kWh of electricity per day. If each kilowatt hour of electricity is calculated as 0.5 yuan, the daily electricity bill is 3.6*0.5 = 1.8 yuan. An average of 30 days per month is 1.8*30=54 yuan.
Method 2: Use a clamp meter or multimeter to measure the operating current of your water pump, for example 0.23 amps, and general household electricity is 220 volts. Current x voltage x time = 0.23*220*1=50.6*24=1214.4*30=36432/1000=36.432*0.5=18.216 yuan. Among them, 0.23 is the working current of your oxygenation pump, 220 is the general household power supply voltage, 1 corresponds to one hour, 50.6 corresponds to the power consumption of 50.6 W in one hour, 24 is 24 hours in a day, 1214.4 is the power consumption of 1214.4W per day, and 30 is 30 days, 36432 is the electrical energy consumed in 30 days (one month), 1000 corresponds to 1000 W = 1 kilowatt hour (this is how the degree is usually converted), 36.432 is the number of kilowatt hours of electrical energy consumed in a month, 0.5 is the unit price of the 'electricity (0.5 yuan per kilowatt hour), 18.216 is the amount of electricity you need to pay. The electricity bill price of 0.5 yuan is just an example. The actual situation is determined by your local electricity bill.