Looks like you don't have a Taylor K-2006 kit which is capable of testing high chlorine levels. Reporting 10+ means that you could have 20, 30 or ??? We recommend everyone use this particular kit. You can pick it up through the test kit link in my signature below.
Your pH is a little low. Use some 20 Mule Team Borax (laundry aisle at Walmart) to raise it. Add a half a box slowly to the skimmer while the pump is running. After a couple hours, retest, and redose. 7.4-7.6 is what we usually aim for but anywhere 7.2-7.8 is ok.
Your alk is fine. Your CYA is ok at 30 but we usually suggest a little higher like 40-50. After you get the pool cleared up, you might want to consider adding a little more.
Let's go ahead and have you see if you can figure out how high your chlorine is by using a dilution method to force your kit to read higher. It is not super accurate, but better than nothing (until you can order the good kit!) Testing Without a Good Kit
Report back with your results and then somebody here can help you go from there. Also, tell us exactly what all you have put in your pool meaning ingredients and not just 'shock.'
We would also like to ask you to fill in your pool's information in our pool chart. Only takes a minute to do but helps us give better advice for your pool.
Pool Chart Entry FormLastly, here is the info about adding DE to a sand filter. Adding DE to a Sand Filter
Pool Chart Results
Hope this helps!
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