Using an auto top off unit will make your life so much easier! No more wasting time and carrying and lifting heavy buckets to replace the water lost during evaporation. It will all be done for you!
In my own experience, I would regard this piece of equipment as essential. It will automatically monitor you water level and when it detects that the level has dropped, it will automatically off the system from a reservoir. This can be a purpose made reservoir tank such as a water container however most larger saltwater aquariums have them built in as standard.
Your sole responsibility will be refilling the reservoir which could be once every week or two depending on how big your reservoir is.
An added benefit of using an auto top off unit is you do not have to physically be there. This means that you can go on vacation* for a week and it will carry on topping off as necessary, as long as you have supplied top off water for the duration.
*It is always advisable to have someone you trust to come in and check on your tank when you’re away from home for an extended period, just in case something has gone wrong and needs attention.