I did not go to the pool store for my new filter and pump setup , I got it on craigslist from someone who was taking down a aboveground pool . My filter was for a 22 foot diameter 52 inch deep pool , the pump and filter are Hayward . You ask about a 22# , that number does not really make sense to me . It should be more like 16-22" and the other number will be something like 150-200# . The number with the " in it is the diameter and the number with the # is the amount of sand it holds . If the filter you are looking at really is 22 pounds it is likely way too small to really be any better than what you have . I changed my filter to the larger sand filter not only for better filtration , but also so I would have less time servicing the the system . With the larger filter I rarely have to backwash the filter and when I do it only takes a short amount of time . The sand filters are readily available on Ebay for reasonable prices , or you might find one on Craigsllist like I did , possibly even in the local classifieds . People often decide to remove thier pools and just sell the pumps and filters from them for reasonable prices . My pool is the same dimensions as yours , but it was last years pool . I have noticed on the pool isle at walmart that the ones they are selling this year have a different looking pump than mine came with , but the same type pool . If you have the 1 1/2" hose connections it will be a really easy install for you because you already have the right size plumbing . Just find a decent sized sand filter for a normal above ground pool and it will hook right up . I was told that anything over the 1hp pump might be too much for the small pools like ours , not really sure if that is true or not . What we were told was that it might collapse the walls of the pool . I have not had any problems at all with the 1hp and it has plenty of power for my pool . The Walmart here in my area has 1 micron carbon elements for the whole house water filters in stock and they are not very expensive , like $6 for two . These will filter all of the visible particles from your water . If you are still getting silt through the 1 micron filter it is because you are putting too much water pressure on them and it is bypassing and going around the filter at the top and bottom of the housing . If that is the case slow down the water flow a little and it should improve . You will also want to keep an eye on the element ans wash it when it starts to plug up . The ones like this that filter really fine are not as good for high flow applications , but will be okay to get your pool filled up . I have the 1 micron filters in line in several places in my home , laundry and showers etc .