"bk" wrote in message
...
I should have said that I'm in Miami Beach.
Were still in high 80's.


The only thing activated charcoal does is to remove volatile organic compounds
and heavy metals from the water. It does not remove much, if any ammonia,
nitrites, or nitrates, the latter being the primary cause of algae blooms. Most
likely, your pond has finally reached equilibrium, and the nitrosomas bacteria
are finally doing their job.



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"Oxymel of Squill" wrote in message
...
or it could just be that summer has gone away and there's less algal
growth?

"bk" wrote in message
...
I had auful green water, I mean really bad thick looking green water.
I now how about 15 african cichlids in about 1200 gallons.
700gph pump to tetra canister filter.
I think it the activated charcoal that cleared things up.
I used a half gallon size container. Folks told me that I needed 20 lbs
for this pond size.

Don't know if I still had Koi if it would be this clear. I swear this
water
looks drinkable.

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