The direction of the pool circulation: within the pool; water should circulate in a counter clockwise direction.
Starting at the skimmer, water travels from the skimmer to the pump (the pump is what makes everything work like the heater etc, from the pump to the filter, thru the heater, thru a chlorinator if you have one , back to the pool.
in the circulation system
Not enough information circulation from where to where? see discuss
no you would have to do something about it
You can use a pool vacuum to clean dirt off the bottom of a pool. A pool vacuum clear is designed to be connected to a water source or it can be connected to your pool's circulation system.
They do the same thing except the robotics do not interfere with your pool circulation and can be programmed to your pool instead of a random pattern.
It depends on the season. In the winter, you can get by with 4 hours circulation. Normally, in the summer you need around 8 hours of circulation. If you are thinking about not using the pool in the summer, you may can reduce to 6 hours. Pool is still at risk for algae, even if no one is swimming.
You may try a suction side pool cleaner. Connects into the skimmer. No booster pump needed. Pool Vac, Kreepy Krauly are but a few.
1 to 2 hrs. New answer: By pool powder - do you mean dry chlorine? Minimum time may be about 20 minutes with a good circulation system. That too, depends on the quantity of the "pool powder".
The circ pump is used to circulate the water thru the filter. The booster pump is for running the pool sweeper.
You can get by with a 1/2 hp pump if everything else is sized correctly and it is just for circulation only.
In general terms, a swimming pool needs to have disinfectant (usually chlorine or bromine) present in the water and a pH between 7.0 and 8.0 to be safe for swimmers. If no disinfectant is present, organisms may grow that are dangerous to people or harmful to the pool. Even if a pool is not in use, if there is water in the pool, a residual amount of disinfectant, proper pH, circulation of water through the filter and regular cleaning is necessary to maintain the pool to prevent damage to the pool finish and mechanical equipment. If the water sits without circulation or is not treated properly, algae may form and metal parts in the pool pump or heater may be damaged.