I've never rinsed or cleaned my sand filter in the 4 years I've owned the pool, because I'm unfamiliar with the equipment and loathe to pay someone to do it. At this point, it's either channelled or dirty because the water returning to the pool has bits in it. (Great technical term, "bits.") I have a feeling this is a huge, all-day project since I have no clue what I'm doing, but it has to be done or I'll go crazy vacuuming the bits over and over!
I bought new sand and DE to add to the filter. Looked all over TFP, but can't find a "how-to" for either rinsing or changing sand, though I did find one for adding DE. I have an old-fashioned sand filter, so old that there is no make/model information anywhere. It's shaped like a big egg.
If you're able to help with this, please keep in mind that I have no idea what a "diffuser" or "lateral valve" or any other piece of equipment that might be obvious to you looks like. (I wish my whole pool came with a manual -- I am good with manuals -- but alas, no.) I'd like to start with the easiest possible fix, and proceed from there.
Thanks in advance for any help!