Pool Water Problem

[Dave73]

Newbie, here. I have 18'x48" round above ground. Filled the pool last fall 16" of water and did nothing to it. This spring we had 1500 gal. roughly or topped it up. Netted and large material, pumped the rest through a bed sheet filter to get any smaller material. Added a 1L bottle to make material to clump up at the bottom of pool. Pump more through sheet and ran cartridge filter. Found the filters filling with grey like sludge very slimy. White particals floating and then settle to the bottom. This material looks like brown dust when pushed around and clouds water instantly. Then resettles, I've got 6 cartridges that i have been trading and washing running them for 3 to 4 hours at a time. This dust like material is very hard to vac because it stirs it up so easily. We have done this vac many times what is this material can i get rid of it by adding chemicals? Oh i purchased a salt water conditioner added salt but have not run it much. Used test strips and the ph seems fine akly. seems fine and cloreen is fine. Also used test in 2 small villes seemed good.Could someone give me an idea, thanks.

[polyvue]

Newbie, here. I have 18'x48" round above ground. Filled the pool last fall 16" of water and did nothing to it. This spring we had 1500 gal. roughly or topped it up. Netted and large material, pumped the rest through a bed sheet filter to get any smaller material. Added a 1L bottle to make material to clump up at the bottom of pool. Pump more through sheet and ran cartridge filter. Found the filters filling with grey like sludge very slimy. White particals floating and then settle to the bottom. This material looks like brown dust when pushed around and clouds water instantly. Then resettles, I've got 6 cartridges that i have been trading and washing running them for 3 to 4 hours at a time. This dust like material is very hard to vac because it stirs it up so easily. We have done this vac many times what is this material can i get rid of it by adding chemicals? Oh i purchased a salt water conditioner added salt but have not run it much. Used test strips and the ph seems fine akly. seems fine and cloreen is fine. Also used test in 2 small villes seemed good.Could someone give me an idea, thanks.

What's the source of your fill water? I suppose you could take a sample to a pool store for a metals test to see if it is iron, but it is more likely dead or dying algae. Recommend posting full test results (Free Chlorine, Combined Chlorine, Total Chlorine, Total Alkalkinity, CYA (conditioner) and Calcium Hardness) for further diagnosis. What product are you using to chlorinate the pool?