Hi Greg and welcome to the Pool Forum. With a CYA of 80ppm, I wouldn't use any form of stabilized chlorine or else your CYA will continue to rise. You are already on the high side. Trichlor tabs and dichlor granules are both stabilized. I would suggest using either liquid pool store chlorine or just use plain, unscented household bleach which is what many of us on the forum use. Neither add CYA. Get the Taylor K-2006 and run a complete set of numbers and let someone here have a look.
Regarding pump run time --- typically 8-10 hours per day is adequate. You might do it in two 4 to 5 hour cycles.
I think your algae problems have more to do with high CYA and low chlorine levels than your pump run time. With high CYA, you need more chlorine. Take a look at the Best Guess Chlorine Chart in my signature below for more info about that.
Again, welcome. Hope you enjoy the forum
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