Hello, and welcome to the forum!!
Clearing up your pool won't be hard, IF you have a little patience and a proper test kit! The test strips you're using are useless when it comes to clearing up pools. They can tell you if you have some, or no, chlorine in the pool, but that's about as reliable as you're going to get.
So...You need a test kit. A cheap OTO kit (uses red and yellow drops to measure chlorine and pH) will be better than the test strips, at least for now. It will read chlorine up to 5 ppm, but you can force it to read a bit higher by diluting the pool sample 1:1 with distilled water and then testing from that sample and multiplyig the result by 2. It's still a ballpark, but much better than the strips. The kit we really recommend is the K-2006, which has tests in it for most everything you'll need to know, and is able to read chlorine levels up to 50 ppm or so. You can find it online at several places, but one of the cheapest is at the Amazon link in my signature (plus the PF gets a small donation from the sale) Only buy it if it's Amato industries as the seller, though--some of the other companies are substituting a different kit that is NOT the same thing.
We also need to know if the pool has any CYA (also called stabilizer) in it. Can you take a sample to a pool store that uses drop-based testing and ask them to check for stabilizer? They're going to try to sell you a bunch of stuff, but just smile and say you have it at home--don't buy any of it, especially algaecides, phosphate removers, or calcium. Just get the CYA level and post it here.
Once we know the CYA level, we can tell you how high to raise the chlorine (the "Best guess chlorine chart" is linked in my sig, too) to achieve "shock" level. Then you just have to maintain that shock level until the pool clears. WE recommend testing and adding more chlorine 2-3 x daily, or as often as you can, because the more consistent about keeping the chlorine up, the faster the pool will clear up. We recommend plain, unscented bleach for the chlorine source, since it doesn't change any other level in your pool water except chlorine. And to give you an example, in 9K gallons, each gallon of 6% bleach you use will raise your FC by 6.7 ppm, so I would get several jugs of plain, unscented bleach to start with.
GEt your CYA tested, get a drop-based test kit of some sort, come back and post the result, and we'll be glad to get you on the right track!
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