If the stabilizer has dissolved, you need to consider it active and doing its thing, even though it will not register on a test for a week or so.
You have now added 4 pounds of stabilzer, so you should assume your CYA is 30. Where do you live? Once you get your water crystal clear, have completed any necessary shock process, and have a good understanding of the testing and chemistry part of all this (you are just about there!), you'll want to figure out if 30 CYA is the right amount for you. If you live in a very hot, sunny part of the world and don't get much shade, you might determine you want even more "sunscreen" for your chlorine (which is sort of what CYA is). For many situations, however 30 is a good number -- it protects the CYA a bit but keeps your shock value reasonable if the pool gets out of whack. Fine tuning your CYA can be done later.
So, with a CYA of 30, you need to NEVER let your FC fall below 2 and should dose with a target of 4 - with the idea being if you add to an FC of 4, you can swim (which will leave junk in the pool that will eat up FC) and you will lose some to sunlight - but normally starting with 4 will still leave you at or above 2 by the next daily testing/dosing schedule. You can cheat up to 5 as a target without a problem but you cannot fudge on the minimum number of 2 FC. The Chlorine/CYA chart can be found in Pool School.
When testing for CC, if the sample stays clear after you've added the five drops from the yellow-topped reagent (I can't recall the number - but not OTO) - if it stays clear, that means you have zero CC. Zero is great, as is .5. Anything over .5 is a sign you need to do go through the shock process.
What does your water look like now? In your initial post you mentioned you had algae on the floor. Have you figured out the Pool Calculator (link to it from Pool School)? Have you read How to Complete the Shock Process in Pool School? If your water is not crystal clear AND you have no more than .5 CC AND you lose no more than 1 FC in the Overnight Chlorine Loss Test, you need to continue (or start) the shock process.
If you are going to start the shock process, be sure to read through that article a few times; be sure you have a lot of bleach on hand; be sure to get your pH to a good starting point (usually closer to 7.2 than 7.8) because once you get an FC over 10, your pH number can't be trusted.