Green algae? Mustard algae?

[AE340B]

I'm going nuts this year with my pool. I get algae every time I look at it. My CYA is at 75 - is that too high? Alk is 120, Ph is 7.2, Chlorine is now 6.0, I've already begun to boost that. What's a normal CYA number? I have no choice but to use 3" pucks, as I'm away from home a lot and my pool has to be somewhat self sufficient. Does anyone make pucks without the chemical that makes the CYA number get too high? I keep the chlorine levels up according to the chlorine/CYA table that appears elsewhere on this site.

I keep the pool very warm, about 86 to 88 degrees. I did the same last year, and never had this problem. I just can't seem to get rid of the algae problem this year. I don't know if it's green or mustard algae - it's about half way between green and mustard in color. How do I tell the difference? The water is clear, I just get the algae on the floor and slanted parts of the side of the pool. I clean it all up, use the pool then cover it with the solar cover. A few days later I take off the solar cover to use the pool again, and there it is again - algae all over the floor of the pool. I then vacuum it all up, and shock the pool. Last time I super shocked it all the way up to about 30PPM, figuring that this would kill anything left behind. I also backwashed the filter and put in new DE so there would be no algae in the filter. I took the cover off today to use the pool, and you guessed it - ALGAE again! I can't vac to waste as the pool is just too darn big and takes too long to vac, I'd run out of water level at the skimmer half way through. How do I know if it's green or mustard algae? What should I do? I'm lost. PLEASE, any advice is appreciated. I'm tired of hand vacuuming this thing.