52" X 24' above ground Vogue Pool (10 years old)
Hayward Power Flo LX (new last summer)

I have only ever used granulated chlorine in the pool the last two years (very expensive....)

Opened 4 days ago
No leaves but slimy jelly-fish-like algae left over from last summer
Dark green

Put 10# granular chlorine in 3 days ago. Pool quickly turned light, slightly cloudy blue

Added 1.5 gallons bleach yesterday at dusk, jelly fish congealing into blobs and floating into filter basket but still on bottom and sides of pool (but it looks different from initial look)

Added another 1.5 gallons bleach early this morning

Got a HtH 6-way test kit (will order Taylor next paycheck...) and did testing this morning. As you can imagine:

Chlorine off the charts (red)
Ph 6.8
Alkaline was red (should have been green.....)
Cyanuric test couldn't be measured

Thanks! Love this site. I've been reading and reading---but I am still unsure where or what to do. All help appreciated.