Raising KH With Coral or Oyster?

[LibraKoi]

We place our sack of oystershell in the third bay of our filter system along with the Japanese matting allowing for maximum flow rate through the sack itself , you dont have to place some in every filter or have to majorly over do it as others have using 100lbs or more just enough to effect the PH if needed we use around about 15-20lbs thats all with no trouble .
When needed it will start to break down thus altering the ponds Ph to what is required for the pond.
We also use zeolite to leach any ammonia from the system, we have two sacks one charged the other in use then its a simple matter to change the sacks of zeolite each filter clean

Dave

Thanks Dave--I'll give a test later to see any changes.

 

[addy1]

Hi, How large is your pond?

around 9000 gallons, if you count all the water i.e. the small ponds too it might be 11000 gallons.