You may try a suction side pool cleaner. Connects into the skimmer. No booster pump needed. Pool Vac, Kreepy Krauly are but a few.
Would advise that you get a professional to address the situation first hand. The main drain is intrigal to your circulation.
If they feel main drains are not required that brings their marketing/ sales practices into question.
Normal - could range from 5# to 35# depending on the system and many other factors. Ken
Most main drains for vinyl liner pools have a threaded port inside of the drain itself. This threaded port is used to plumb in the main drain. The easiest way to fix this is to swim down to the main drain, remove the grate, which is held on with two screws, COME UP FOR AIR, then screw in a threaded 11/2 plug into the port. This will stop water from leaking if the leak is in the line itself and not in the drain.
it is in a normal drain
3/4 open for skimmer, 1/2 or 1/4 open for floor. If your pool has a deep end and the deep looks murky while the shallow layer looks clear, do a few cannonballs off the springboard, else open the floor drain to full for a little while.
Aorta
The circulatory system is made up of two main pathways. These are the systemic circulation and the pulmonary circulation.
If you mean you are losing water, it may be a broken or cracked main drain or possibly your hyrdo-static valve is malfunctioning. One other possibility is a break in the pipe going to the main drain.
Circulation is the pumping of blood and oxygen throughout your body. Your heart is the main organ in this process. Without the circulation system, you could not function.
the systemic and pulmonary circulation
The News Tribune has a circulation of 85,000 on all days. On Sundays, its circulation is 100,000. The main area of circulation includes South Puget area and South Washington.