Yes, that's the way you buy them.
yes they do it's very important that they have there water cleaned out once and a while.
There are Aquasana water filters for the shower. Found on the Aquasana online store you can find different selections of filters for your shower for different prices. Also, the online store amazon has Aquasana water filters for the shower with low shipping costs.
I would say at the hardware store
You can by a "filter cleaning" chemical at your pool store. It usually requires you to soak the filter in part water and part chemical for 12 hrs or so and then spray with hose. It works great on our hayward cartridge filter.
YOU clean it by first getting it lab. tested to see exactly what is in it, then fitting appropriate filters.
Probably one of the most recognized water filters is made by Brita. These filters can be purchased at almost any retail or department store.
There are a number of online locations where one can buy iron filters. For instance, Budget Water, Clean Water Store, and Media Wave all have a selection of iron filters for sale.
Is it true that the plumbing in the cartridge housing may have to be cleaned out/cleared to insure good water flow?
Using Incredibly large filters and water grime-eliminaters, kind of like a high-powered Bam!(tm) product
Whole house water filters allow one to get clean, clear, filtered water straight from the tap. Whole house filters can be bought from Sears and your local plumbing and heating store.
Overall a Cartridge filter seems like a good choice for several reasons: 1. They are much smaller 2. They tend to pick up finer dirt 3. They are manually cleaned, so no pool water is used (sand filters are backwashed. This uses lots of pool water) However the disadvantages are: 1. For them to work properly again, they must be let dry after cleaning. 2. The Western Australian Health Department says that pool water should be completely replaced every two years. By backwashing a sand filter, you are always replacing the water. I live in Florida and I have a pool business myself, a cartridge filter is better than a sand filter.If a sand filter breaks it is more expensive to repair than a cartridge filter because 9 times out of 10 the top of the sand filter where the pressure guage is will leak and that means replacing that whole part or the whole sand filter.Most cartridge filters are 2 pieces, a top and bottom half with an rubber O ring in the middle. Most of the time you can buy the top half or bottom half separately saving you money on repair cost, and what usually happens is that the O ring is damaged due to the chlorine in the filter and or the weather. Cartridge has much finer filtering ability and doesn't require backwashing, which drains water from the pool. But it does require period cartridge replacement. Sand is much cheaper and less likely to become plugged with dead algae. The media (sand) only needs to be replace roughly every 10 years. For most people sand is the best all around choice.
Camping water filters can be purchased at your local outdoors store. I have found them at Mountain Equipment Co-op, Three Vets, and Coast Mountain Sports.