1.While this isn't required everywhere, many places do require pools to be fenced in. Fences are far more effective at keeping people and animals from falling into pools than any pool cover. So, a mistake would be assuming that the pool cover on its own will be completely effective when what you really need is a fence. 2.A non-rectangular shape or having unique features that stick up can make it a lot more difficult to get a pool cover. Often, you'll have to get a customer cover. These kinds of pools also often can't as easily get automatic covers because those typically require a straight track. 3.One simple tip is just to remove standing water from the top of the cover. The longer standing water pools up on top, the more strain that puts on the cover that can weaken it over time.
To answer your last question: I always tell people to make sure that their pool cover can stay clean and dry before putting it away. Spraying off any leaves and dirt, scrubbing any persisting spots with a simple brush and water, and allowing the cover to air dry in the sun is able to prevent mold and odors. Damp covers stored in storage can attract pests, create unpleasant odours, and compromise the material of the cover. Brushes and soft cloths cost about $20 each and will be able to cope with most cleanups no problem. The significance of good storage is also important when the cover is clean. It is possible to extend the longevity of a pool cover by removing them from direct sunlight and away from exposure to moisture. A pool cover can be preserved for up to twelve years from a limited six years if it is stored in a climate-controlled garage or a tightly sealed plastic bin (less than $100 from the hardware store). While those who are able to store their cover well experience long-lasting results, skipping the above-mentioned steps often leads to mold, tears, and broken seams.
A simple maintenance tip I can give to double a pool cover's life is to keep it free of standing water, leaves and other debris. After a storm or even a week of intermittent weather, the conglomeration of organic matter on the cover disintegrates quickly, stains the material, and causes the seams to become brittle. A cover containing five liters of water and a handful of leaves will develop algae and mold within a week of placement and permanent staining and fiber degradation will result after one season. Owners that sweep and pump covers every couple of days see them staying in longer. I recommend using a submersible cover pump and a long handled soft brush. Once the debris removal is done, sunlight and air can dry the cover before bacteria and mold can set in. This can save you per year in premature replacement and covers that I have seen, cleaned and dried regularly, last between five years and over 10 years.