Thank you for all your help, and I have a couple more questions.

Since my FC s at 5 and I need to get it up to 15, then adding 4 gallons will bring it right up to the 15 mark.

I will obviously have to use the method you mentioned in your sig since I have a cheaper test kit. Mix 1 part pool water and 1 part distilled water and multiplying by 2. I guess I can mix this in just a regular container/jug as long as they are measured equal, and from that water I can dip the test vial and get a reading.

I will get the pool kit you mentioned ordered by the weekend. Good to know that I won't have to use any more shock or tabs.

Basically, with the combination of the above method and continuous brushing and vacuuming I should start to see the algae disappear?

I don't know what the correct pressure is for "clean filter pressure", but when I backwashed earlier it was reading 13psi. Is that normal? Also, I have a main drain which is off due to the fact the handle broke and I am having difficulty finding a replacement, although I believe that shouldn't be a problem. I hope it isn't slowing down the process.

Also, the yellow ring I have around the water level and on my steps, is that part of the algae too? It's not metal? Can you tell by my results posted that metal is not an issue?

Sorry for so many question and if I'm repeating myself, but I've never had this much trouble before with the pool and I really am getting frustrated. We're due to have our regular pool party 4th July and I want it to be up and running.

One other thing, out of curiousity, even though the pool doesn't look inviting, with the levels I have, is it safe to swim in?