The easiest to use is the sand filter. the drawback with it is that you lose some of the pools water when you have to backwash.
Then there is the cartridge filter they need to have the filter elements cleaned periodically .A bit more labor intensive but there is far less waste of water and the filtration is also finer.
The DE filter is the finest of the pool filters backwashes but is also the most trouble to keep operating properly.
All in all I would go with the good old sand filter for reliability and ease and throw a waterco hydrocyclone in front of it to reduce the number of times I had to back wash.
Chat with our AI personalities
These days all of them are much of a muchness. Personally I would opt for a sand filter, however these do tend to waste water when backwashing so if that is a problem get a reasonably big cartridge filter, They only need to be hosed down once in a while and require far less water wastage, The are also a finer filter then sand.
An off-line chlorinator, that uses chlorine tablets, is usually the most cost effective and convenient method of chlorinating the pool. Pool Masters