very dirty - drain and refill?

[td3201]

I have a 15000 gallon fiberglass pool. Last year, I had to get a new cover, but it didn't show up until a bunch of leaves fell in it. Like a bunch. I think I'm getting close to getting at least the leaves off the bottom. Of course the water is very dark. I expected that. I'm wondering if there is much value in draining it as much as possible and refilling with clean. I understand that I cannot completely drain it because it's fiberglass.
1. Any value in draining and refilling?
2. How much water can I take out?

Thanks!

 

[ajw22]

A fiberglass pool should not be drained much or at all. The weight of the water holds the pool into the ground against any ground water pressure, and you don't know where the balance is.

Look at our No Drain Water Exchange Process described in Draining - Further Reading

 

[td3201]

Holy Darn. I see an excel sheet in my future.

Do I need to drain? It’s a chlorine pool with a cartridge filter. Weighing cost and time associated with letting the filter get all the matter out vs. the water replace method. Any opinions?

 

[mknauss]

If water is cheap, exchange as much as you can.